For XP, most likely a sandforce based drive.
Though, some OEMs do have utilities to use their drive as well.
How do I know what drives are Sandforce-based??? That info doesn't seem to be found anywhere... :-(
I was looking at this drive:
http://www.crucial.com/store/partspe...1334BFA5CA7304
Seems to be the best price/performance drive out there. Comments?