Natanox

Technically their Cube L w/ a 9060 XT 16GB outperforms the Steam Cube by a long shot (I’d guess 40-80%) and offers upgradeability but it’s also wildly more expensive and a little bit bigger. It also comes with 32gb RAM at a minimum instead of the Cube’s 16gb which contributes to the high price. Choosing an older GPU like the 7600 doesn’t make too much sense cost and feature wise, for Couch gaming you’d want the newest FSR’n’stuff in a just-works manner.

Technically a full AMD system is best for SteamOS, but the most important piece is the GPU (do not chose an Nvidia whatsoever). Their Cube with AMD is outdated. It will work fine with the Ultra 5.

Beating the price point of the Steam Cube is almost impossible if bought new, even full diy systems have a hard time unless using used parts.