I'd get another hard drive if I was you, a fast one to store the OS and some games that use big textures like Crysis. A 10000 rpm or a SSD so you can keep the 500 GB for small games or movies...

Nah, 10000 rpm HDDs are way too expensive. And I'm already thinking about a 1TB HDD.

http://www.anandtech.com/video/showdoc.aspx?i=3183&p=4

Theres some indication, though I believe the Phenom 2 3.2 would be about as fast as the 3.33Ghz example, especially once you tweaked the performance a little higher though its probably slightly slower with DDR2, DDR3 should give it the edge here.

If you only go with two cards your CPU overhead will be lower and you can achieve better performance with less and achieve better scaling than with 3 GPUs and a faster CPU. That third GPU really doesn't seem to be worth it from a cost perpective. Sure it looks really cool, but its definately not going to give you the same bang vs buck.

@Vetteman check out www.techreport.com, they have excellent builds up every month.

incredible setup, however, why not wait for new graphics cards to come out and get 1 instead of going the way of tri sli as quite a few games STILL do not support it fully(at least thats what i've heard) but do whatever u want, you will get amazing results with a rig like that, I just dont think you really NEED tri sli, imo save ur money and wait for new cards :)

I would wait till october to build this comp, its just three months away. You will get direct x 11 cards. i would just wait untill amd or nvidia release their new cards. Also about the tri-sli, i think next gen games will support them but not this gen.

Same as above, better to wait for DX11 cards. Actually the best I've found is wait ~1-2 months after both NVidia and ATI release their cards. At that point, the dust has settled on which is better and there'll be tons of deals/discounts available.