Need help deciding what to spend 4-5k on for a local rig.

Right now I think ive narrowed down my 2 options for what im trying to do, Either a DGX spark like the 1tb asus for about 3600-4000 or a A100 80GB SXM4 with an adapter to PCIE and regular 8 pin on my threadripper setup for about 5-5.2 grand. This isn't exactly a fair comparison but its the 2 options that 1) fit my budget and 2) do the things I need (mostly, looking at you sm121 fake blackwell) I want a rig that's decent for inference (dgx isn't great but for just me its the minimum id need) and.