Yea your deffo gonna have a nice surprise when you put this together,As stated by "lunarwolf" & "ro55o" i would slo go with the 64Bit OS (to benefit from the ram your using)
funnily enough a couple of months ago i was running more or less the same spec you have now "Athlon 64 3500+, Radeon 9800 256mb and 2 gig of ram" and i took a big hop skip and a jump to this beauty
Took me about an hour to put it all together and to install vista,I did a few stress tests with "ORTHOS" and everything is and has been stable ever since,I run Crysis,Far cry 2,Dead space,Mercenaries2,Pure,CoDWaW,NFS Undercover,Fallout3 and many more all on the very highest settings and my computer does not even hickup m8
I was gonna go for the P5Q Pro board myself,But i wanted to go up into the new DDR3 mobo's, Let us know how it runs once you have it up and running m8
Good luck and happy gaming with it
