alright if anyone is still not using windows 7 GET IT.
It's 100x better than vista
Its 1 MILLION times better than XP
It's fast. It's Furious.
I'm running a version called Windows 7 Tiny, basically a guy has taken the normal windows 7 dvd, he's taken out heaps of components that people don't regularly use leaving a CD size installation of windows.
Takes 15 minutes to install, unattended. Within about 20 minutes you're inside windows doing your thing.
Firefox 4 tabs open, about 5% cpu usage. about 660mb ram used and actually 100 of that is Firefox + GoogleTalk so you're talking 500mb of ram used for Windows 7 that is awesome.
GET IT NOW!
PS: what are you using currently?