Original xbox 360 or the 360 s for replaying old games?

The S also has the HDMI port built in, a lot of the early fat models only have component. Bear in mind the 360 store closed in 2024, so you can only redownload stuff you already own. Discs are the way now.

the S, no contest. the early fat ones are the red ring of death models and they're 15+ years old now. the S is quieter, runs cooler and has wifi built in. it plays exactly the same games, so there's nothing you gain going original apart from the look.