Pop-Up

Best way to narrow down is decide if you want a single or dual boiler. If you're not making multiple milk drinks back to back, you really don't need a dual boiler unless waiting 30 seconds between pouring your shot and steaming your milk is not something you can handle. For single boilers look at Profitec Go, Quick Mill Pop Up, Lelit Victoria, etc. First two don't have a hot water spout, I dunno about the Victoria. So you also have to decide if you mind using a kettle for americanos. Dual boilers I'm less familiar with!

Everything I've read about the Profitec Go is that construction is excellent, and is one of the main selling features for all Profitec machines. I don't think construction quality is a differentiating factor between single and dual boiler machines. It has a PID built in, but no hot water spout, so not sure it can do Americanos. I went with a Quick Mill Pop Up. It feels really nicely put together, nothing about it feels cheap (except the provided useless tamper), but I've only had it a couple weeks and it's a relatively new machine. Also no hot water, but I only drink espressos or cappucinos. For what it's worth, I debated dual boiler as well, but it takes literally 30 seconds or so for the Pop Up to bring the boiler up to steaming temperature from brewing temp, so it's not an issue for me.

Well if you're that set on it, I would go with the Bambino plus based on the fact that it can basically auto steam milk and heats up really fast. Coming from someone who just purchased a Quick Mill Pop-Up, it's a beautiful machine and I'd purchase it again, however it takes at least 5mins to fully heat up and the milk steaming is a learning curve. The same is to be expected from the other machines you listed. For the grinder, I would avoid the DF54 as it's prone to clogging and other reliability issues. I personally went with the Eureka Mignon Zero and I'm quite happy with it, absolutely solid and no faff. You could go with the Silenzio or Facile since you want a hopper and timer. Baratza Encore Esp/Pro could be another good option.

A dual boiler like the BDB or Silvano might not be necessary if OP is mostly making drink for themselves only though. I have a Quickmill Popup and it gets to steaming temp in 30secs. Hardly worth the 1000$ premium with the Silvano (in Canada) in my case, and I make 2 flat whites every morning.

In case anyone is confused, yes, the Pop Up has a three-way solenoid, and one leg goes to the drip tray. If I were to speculate about the post pull pressure, I'd look at the flow control valve. Also my Go doesn't go to zero after it flushes to the drip tray.

I've bought this, hopefully it works

Go with the Quick Mill Popup + DF54. Dream setup. Lance has a video on his YT channel about the Quick Mill

Solid machine, but overpriced for what it offers at this level. I used the Sage (same model) for 4 years and was quite happy with it—especially considering I bought it for around 300 Fr. Now I’ve upgraded to the Quickmill Pop, which costs 899 Fr. If you’re planning to spend that much, I strongly recommend going for the Quickmill instead.

I’d roll with a GCP if I were you. A profitec go or quickmill pop up are better but twice as much.

Quickmill pop up instead of the mara. Varia vs4 or df64 or malkonig cheaper grinder instead of df54. Ikape convex basket instead of vst basket. Blind shaker instead of wdt. Timemore scale instead of maestri. Not sure what the kettle is doing there also, but I assume it's for filter, if not, would also not invest right away in one.

Quickmill pop up + mazzer philos