
GL.iNet
GL-MT6000 (Flint 2)
OpenWrt enthusiast's choice; good value, but lacks 6GHz.

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The tp link archer AX 53 is currently on offer right now on Amazon and has max speed of 3000mbps so should be well enough for your usage or if you want to move further with virgin. The AX 18 should work too but for the extra 20 quid and with it being on offer may aswell go balls to the wall.
I use TP-Link EasyMesh without any issues. C6 v4, AX23 and AX53 in one mesh network. The AX53 is the master (also works as DHCP server), others are nodes. Works pretty well.
It depends; Wireless extenders and Mesh Systems are both, obviously, **wireless**. However, the main difference between a mesh system and an extender is that a **mesh system** uses a single name for your SSID, providing continuous coverage throughout an area. **Extenders**, as their name suggests, extend your original SSID (e.g., KV Netlink) and create a new "Extended SSID" (e.g., KV Netlink EXT). When you move around, devices connected to the original network won't switch smoothly to the extended network. Sometimes, you might even have to switch manually. A **wired backhaul** is the wired version of the above, where a new router is connected using a LAN cable. Compared to a wireless system, it provides much better performance and fewer wireless interruptions. I use a combination of a **TP-Link XC220-G3V (Dual Band, WiFi 5)** as my main **modem** for my **BSNL FTTH 499 (60Mbps Up/Down)** broadband plan and a **TP-Link Archer AX53 (Dual Band, WiFi 6)** as a **router** on the second floor, connected with a **Cat6 LAN** cable.
AX23 is enough. My ISP provide me ZTE F6600P ont and it is AX3000 similar to the AX53. It supports 160Mhz that can provide up to 2gbps of speed. But since my ISP is 300mbps then i only use 80Mhz that's why the maximum wifi speed is only at 1.2Gbps. Good enough transferring files. While balancing range and speed. Although AX53 have better processor and ram. So if you have tons of devices then AX53 is good choice.
Depends on your usage, but I use an AX10 for Wireless VR with good results, and iperf3 gave me like 800mbps 2 meters from the router (5Ghz) It will of course also depend on what wifi card you have on your computer, phone, etc. The rest are better routers, but I'd argue for most people it won't make a difference. I have a few AX53/AX3000 on clients and they handle more devices better, but for a house, an AX10/AX23 ir more than enough. Another option would be to future-proof and go the wifi7 route (a 6ghz model, with tri-band) but that's another price entirely and you need 6Ghz or wifi7 support on your computer/phone, etc
TP Link Archer AX53 AX3000 Dual Band Gigabit Wi-Fi 6, you can directly connect this to you fibre connection, it has the ONT port. Has wide coverage also

GL.iNet
GL-MT6000 (Flint 2)
OpenWrt enthusiast's choice; good value, but lacks 6GHz.

Ubiquiti
Dream Router 7
Advanced management, but limited Wi-Fi 7 range, SFP+ issues.

Ubiquiti
Dream Machine Series
Comprehensive control, stable for large homes, but slow support.

Ubiquiti
UniFi Dream Router (UDR)
Modular, user-friendly, but tricky advanced setup, poor penetration.

GL.iNet
Beryl AX (GL-MT3000)
Travel king, versatile, OpenWrt, but bulky power adapter.