Asus B360 Prime with 32GB RAM i5 9400F CPU 6700 XT GPU w/ 12GB VRAM
(all of that used)
... however, I originally bought it all for a virtual pinball build so I'm sure it could be done better with Bazzite in mind from the start.
I went with a white+birch Lian Li A3-mATX to get something barely good looking enough to fit with the rest of the gaming room.