<---- MFW
XP is stable, fast as hell, and ultra-compatible. I don't need a new rig as I've got one hell of a backlog of legacy games to clear before I'd care about anything modern. (last game finished was The Witcher. Currently on KOTOR.) Windows 7 will do nothing for my current rig but slow it down and break the games I want to play. 7 is a Fischer Price OS and can barely compete with a standard install of XP, never mind a tweaked one. I used Vista for over a year, I've played with 7 installs, and so I know for a fact that I can't do a damned thing with either of them. I'd need to double my hardware specs to get them to run like I have my XP running.
I don't have the hardware that needs a 64 bit OS nor a usage pattern that would really benefit from superfetch. The security model of 7 won't do much for me -- most vulnerabilities still allow free access to the user space and the user space is the only thing I care about. So 7 would have no upside, and it breaking compatibility means it has a rather large downside, which makes spending $100 on the thing a total waste of money.