ARM workstations for homelab CPU based AI Inference testing?

I am eyeing @AmpereComputing's Ampere Altra. There's a docker image for optimized PyTorch https://hub.docker.com/r/amperecomputingai/pytorch

I am pretty sure it is just OpenBlas compiled with special options + PyTorch using that, but who knows.

There doesn't seem to be a ton of affordable options. I see the Altra has ASIMD\NEON but not SVE.

If I have a budget of ~3000, is one of their systems probably the best choice? There are several standard formfactor motherboards and even combo kits available at normal outlets.

I'm not _MARRIED_ to ARM, but ~60w idle, 200w tdp when it's busy - that can be cooled quietly, and performance looks decent.