you can install windows on macs. when you press the boot up button, there are 2 options, boot up in the mac OS, or windows. actually recently the fastest notebook windows vista speed was clocked by the macbook pro... stock, no special upgrades...

i definitely wouldn't be in the market to upgrade whether i go pc or mac. i believe in getting something more than good enough, and living with it for a few years. i don't see myself moving to a more demanding game graphically, multiboxingwise anyway. whether i get a pc or mac it'd be 2.something Ghz dual core, 2 gigs of ram, 256 or bigger video card... and everything else stock. but i really suck at building/installing/repairing comps, and i really hate unstable windows when run on a pc.

i used to be anti-mac but my friends let me use theirs and it's pretty badass, although more expensive. but money isn't an issue, i'm the bank. sanity is priceless.