need advice on new system im planning to build...

rampage formula
q6600
bigwater 735(already using)
corsair dominator ddr2 pc2-8500 2gx2
asus hd4850 (planning to xfire)
wd 500GB SATA300 7200
600w psu
NZXT TEMPEST

just planning to have a good pc for ocing and playing games...
all advice is greatly appreciated

Nice set up. I like duel slot video cards becasue they blow all of the hot air out of the case and not recirculate it. Got a card you could throw in that case until the prices come down on a 4870? Always nice to let the hot air out...

PSU... um.... who the hell makes it? I like my toughpower 750. I recomend a good quality PSU. If you are doing CF, then definatly get at least a 750 quality PSU. You won't need 1000 w or anything, but it doesn't hurt to have the joice if you need it. 750 or 850 w would be enough.... Actually, with your water cooling rig, go for 850. =)

Hmmm... good question on the GPU. Really only one way to find out if it will get you by for a few months waiting for pricing to come down... Try it and see. If you find you can't stand the quality, then upgrade to one ATI card. If that still isn't enough, then upgrade for the other. I'm very hesitent to recomend spending money to upgrade on something that won't yeild a noticable performance gain. Honesty, though, I think that 8600 is going to have a tough time of things. Really that depends on the monitor you have and the resolutions you need. If id doesn't work, the only thing it will have cost you is time.

A note on the Q6600. It is nice and usualy will OC ok... for a quad core. The extra cores make extra heat and it also comes out much more sinsitive to high FSB frequancies. Raising the FSB is the only way to OC it. Unless you luck out with a golden chip, the Q 6600 won't OC like a duel core CPU.

That ram is likely more then enough. With the limitations on FSB from the use of the quad core, I bet you wouldn't notice any difference between that ram and some plain old DDR2 800.