Need a lil more help on $1200+ system build

I have posted a few times the last week trying to get some advice on a build for a gaming rig. I will be playing Warhammer Online mostly, but enjoy lots of other games as well. So far this is the build i have put together with the help of people on this forum so far. If there is anything that wont work, or something I can upgrade for about the same price, let me know. I am not experienced with over clocking either, just FYI. And would a Full tower work better? I left the names of the items off the page, because honestly I'm not sure what part of the information to post, so I did links.

(E8400) CPU: http://www.newegg.com/Product/Prod [...] 6819115037

Motherboard: http://www.newegg.com/Product/Prod [...] 6813131219

Hard Drive: http://www.newegg.com/Product/Prod [...] 6822136218

PSU: http://www.buy.com/prod/corsair-75 [...] 78325.html

Memory: http://www.newegg.com/Product/Prod [...] 6820146731

Video Card: http://www.newegg.com/Product/Prod [...] 6814131120 (I know this is a big part of my build,still not sure if his is the right one for me.)

DVD/CD: http://www.newegg.com/Product/Prod [...] 6827135156

OS: http://www.newegg.com/Product/Prod [...] 6832116488

Case: http://www.buy.com/prod/antec-nine [...] 97579.html (Again, I'm not sure if i want to go for Full size case or not, would like to leave the option open for 2 video cards in the future. And if 2 video cards don't work with this build, please let me know.)

Thanks to shortstuff_mt for the help so far on this build. Thanks to all in advance, I really appreciate the help because I really need it.

Maybe a P5Q "no xfire" Save almost $100.
A used Os you have already: Save almost $100
A 4870 x2 with the money you just saved.

Ya but you can always save $100 for a 64bit OS faster then you can save $500 for a new Video card.

I'm planning on gaming at least on 1650 x 1020 resolution if possible.