I bought a System76 desktop a couple of years ago with an rtx 3090 for some AI work and have been super happy with it.
It was a bit expensive, but everything "just works", it's super well built, and I've had no issues for 2 years. They definitely know what they're doing
It was a bit expensive, but everything "just works", it's super well built, and I've had no issues for 2 years. They definitely know what they're doing
(not affiliated, I just like it)