Bigtreetech’s btt pi is quite good for printer use - and general use tbh, but it is geared towards printers

Xtrek would be what pops to kind for me, possibly?

I haven’t had driver related issues with nvidia for a long time, last was some kde wayland stuff fixed a while ago, before that using x no issues for a long time

You need quite the opposite, more cooling on those overhangs. As you are in the chamber, the heated air wont cause warping like outside an enclosure, so crank those speeds on overhangs. I generally run 80-100% on bridges anf steep overhangs. I do also slow down print speed on overhangs significantly to allow more cooling aswell