Don't kill me for saying this, but I have had the best luck w/ Maxtor's. I have installed many of those HD's in to Xbox's and have never had a problem w/ one of them. But here are some other quality brands: 1) Western Digial 2) IBM 3) Samsung 4) Quantum 5) Fujitsu 6) Hitachi Check out this site if you want to see an Xbox HD compatibility list: http://xboxdrives.x-pec.com/