Looking to build a SteamOS box for my TV - Need recommendations

I know the Gabecube is coming, but looking for some instant gratification. Any Recommendations between these or a better alternative? < $600 is my budget, but even lower would be ok.

Chantreey - https://a.co/d/9b0WY2V

8845HS 1TB 32GB DDR5 5600MHz 2.5GbE (my network supports this)

GMKtec K12 - https://a.co/d/2SE7YGk

H255 512GB 32GB DDR5 5600MHz Occulink (for eGPU - may never use)