In the same boat myself.
My main rig (if you can call it that :rotfl
went up in a cloud of smoke and sparks 2 nights ago.
Just ordered a newie, with Intel quad core 2.8, 4 gigs of 1066 RAM, 500gig HDD, but settled on a 1 Gig DDR3 9800GT video card. (couldn't justify the extra $600) Just need to decide on an OS.