mrscopey :
so....
for better performance, cause i use my pc for games, what should i get?
Get both. MS apparently offers a free downgrade to XP for unsatisfied Vista users.
http://asia.cnet.com/crave/2007/09/24/downgrade-your-vista-to-xp/
If you do by Vista buy the upgrade version, then go read this:
http://www.mydigitallife.info/2007/02/01/hack-and-workaround-to-clean-or-fresh-install-windows-vista-with-upgrade-license-dvd/
http://www.mydigitallife.info/2007/02/05/buy-upgrade-copy-of-windows-vista-key-and-use-it-as-full-retail-version/