Deco X90

Deco x60 deco x90 or newer ones, 1 living room + 3 or 4 on bedrooms

There are lots of good choices, For your environment, you indicate you'd prefer not to run ethernet cables, and with a 1G connection, my opinion is you should go for a tri-band consumer mesh system with two or three nodes. Tri-band will give you far better speeds at your satellite nodes than any dual-band wireless mesh. If you could wire for ethernet, it's much more cost effective to get dual-band units and they'll perform about as well when wired in. The nice thing about mesh systems is that most are scalable, so you could start with 2 or 3 and buy/add additional nodes very quickly and easily, if your needs dictate. Examples of this are: Eero 6 Pro, Asus XT8, TP-Link Deco X90, or Amplif Alien. Also there are several iterations of Netgear Orbi and Linksys Velop. Orbi systems and the Asus XT8 use a dedicated backhaul arrangement. Just my opinion but I think Eero's mesh is superior in that it uses multiple bands simultaneously to maintain the mesh and clients can connect to all bands, which is not the case with any tri-band Orbi, or Asus XT8 while the XT8 is in wireless mesh mode. You can free up the XT8's dedicated backhaul band for clients IF nodes are connected via ethernet. Wifi 5 systems are now being sold at significant discounts, wifi 6 systems are kind of the "mainstay" now, and 6E systems are on the market (6 GHz) which are quite expensive and really don't offer a lot of benefit since there are few 6GHz clients on the market right now. Amplifi Alien has quite good reviews and reputation, but it's quite expensive for even a two-node system. I prefer not to buy systems with one router + one satellite, because if the router craps out on you, you can't swap nodes around - so if getting Alien, I'd strongly recommend getting two routers vs. the router + satellite kit. Orbi kits are all router + satellites, so would avoid those for that reason. Eero 6 Pro, Deco X90, Asus XT8, Velop, etc. all come with identical units in their multi-packs. I used two Eero 6 Pros and muy house is 1200 sq ft (main level) and 600 more sq ft (basement), and my lot is 85' x 135', or 11,475 sq ft for the lot, and two 6 Pros covered it all with >100 mbps everywhere ooutside and >300 in the house.

My walls must be something special. I have x90 mesh network and it has crap range. I really do think my walls are special, they’re incredibly hard to drill into and the house is 100 years old. Home is only 1200 sqft and I can’t get any service if I’m more than 15 ft away from a deco.

If your FTTP NTD is stuck in the garage, don’t expect one giant router to cover the whole property. Even a high-end unit like the ASUS GT-AX11000 Pro will choke once you add 20+ meters, two walls, a wardrobe, and three doors. Wi-Fi 6 is good, but it can’t bend physics. What actually works: Stay ASUS: Another GT-AX11000 Pro in AiMesh mode with 5 GHz-2 dedicated to backhaul. Identical hardware syncs better and avoids a lot of the “AiMesh nightmare” stories. TP-Link Deco X95/X90: Very solid tri-band Wi-Fi 6 kits. Great balance of throughput and reliability. Eero Pro 6E: Simple and stable, though be aware that features like advanced parental controls, ad blocking, and network security sit behind a paid Eero Plus subscription. Stock Eero hardware still covers fine, but the extras aren’t free. Ubiquiti UniFi: Fantastic when you can run wired backhaul. Pure wireless uplink works, but it takes more tuning and often won’t outperform a well-placed consumer tri-band mesh system. Placement > hardware. Don’t leave your main router in the garage. Pull a short Ethernet run inside (adhesive raceways look tidy) and put your main node on the first interior wall. Add a second node halfway to the far corner, and if it’s still weak, a third to finish the chain. On a 1 Gbps NBN plan, a good tri-band mesh should still give you ~400–700 Mbps at the far end. With one lonely router in the garage, you’ll likely see <100 Mbps and dropouts. (Side note: I run FixIT Computer & Tech, a small IT shop in Port Angeles, WA. I see this exact situation all the time—new house, NBN box in the garage, and Wi-Fi disappointment. The fix is almost never “buy the most expensive router,” it’s smart mesh placement and making the backhaul work for you.)

First off, sorry to hear about the lightning strike — that’s rough, glad at least two units survived. Mixing in Wi-Fi 6E/7 with your existing Wi-Fi 6 Decos won’t really unlock their full potential, since the mesh will still lean on the lowest standard. Unless you plan to replace the whole setup, you won’t see a big jump. If your two current units are still covering fine, the safest move is just adding another Wi-Fi 6 Deco to keep everything consistent. Wi-Fi 7 is great long-term (throughput, latency, efficiency), but right now it’s only worth it if you’re going all-in or already have a bunch of 6E/7 client devices. As for the AX-50 Outdoor — it’s solid for extending coverage outside (yard, patio, garage). It’s basically just a weatherproof Deco, so don’t expect crazy speed boosts compared to indoor nodes, but range is quite decent.

To be fair, if you don't have any WI-FI 7 devices, it's not really necessary (IMHO...), plus, as someone else mentioned, having that dedicated back-haul comes in clutch for mesh networks, going from the original google home hubs to a linksys WH02 system (example, not a recommendation) greatly increased our speeds on anything connected to a node (as long as it was only one hop, there's one way in the back that's two hops, but it's still pretty fast). We actually have the (a) WI-FI 6 deco system now with Gig internet, and we get excellent speeds throughout the house and yard (again, as long as it's only one hop). To answer your question, sorta, tri-band helps enormously, to use an analogy... dual band mesh is like you (your cell phone on wifi say...) trying to make a phone call to your mom (the mesh node), who's on the phone with your brother (the main node/AP), everything you say has to go through your mom to get to your bother, and then back to you, because she can only listen or talk at one time, also she's in a loud shopping mall. With tri band, your mom just holds the phone up to the other phone so you can talk to your brother directly, there's still some overhead and noise (she walked into a hallway or something now), but the information gets through a lot faster. eta: idk a simple walkie talkie VS phone call analogy may have worked better...

TP link deco mesh triband works great.