I just came from the electronics store with Windows 7 64 bit full version. (incidentally $139.99 Builder Pack). The Tech/Salesman convinced me that I could install 64 bit on my system even though my system is 34 bit and it would be to my advantage. I am too technically naive to really believe that. Did he tell me the truth?
Intel e6600 Core 2 Duo @ 2.4 GHz
Noctua NH-U12P Cooler
ASUS P5Q Pro
OCZ Reaper 2X2GB DDR2 800 (PC 6400)
EVGA GeForce 8800GTS 640 MB
WD 250GB GB SATA II
Corsair CMPSU 550W
Windows XP home
He told you the truth. Your sytem is capable of running a 64-bit OS even though it is currently running a 32-bit one. It'll have to be a fresh install rather than an upgrade, but that's no bad thing. Just make sure that you copy any important data onto a DVD or external drive first as the install will overwtire your current disk.