I ordered a custom Ryzen 9950X3D workstation in a full-size tower from Puget last year with 192GiB of RAM before the memory craze happened and I've been quite happy with it. Zero reliability issues and excellent performance.

Coincidentally, I also ordered a custom Tiki-based gaming system from Falcon NW for a family member and that's also been amazing.

I think I would be hard-pressed to choose between the two system builders, but Puget definitely has the edge for workstations since they offer Full-size towers and other hardware that Falcon NW does not. Conversely, Falcon NW offers custom cases and the very best of hardware for gamers with unheard of customization options like custom paint jobs.