Case and Power Supply Choices

I'm going to be building my first pc soon and I'm going to go ahead and get my case and power supply now. I'm gonna be ordering one of these three cases in the next few days. I need some advice on which one to choose however.

1 - http://xoxide.com/aspire-x-navigator-black.html

2 - http://xoxide.com/thxaiiiv1.html

3 - http://www.newegg.com/Product/Produ...N82E16811133154

Or if you have some choice you think is better.

And then I need to know which power supply would be best for running the computer I will have: Dual Core Processor, Dual gfx cards, pci-e, 2-3gb of ram?

1 - http://www.newegg.com/Product/Produ...N82E16817103931

2 - http://www.newegg.com/Product/Prod [...] 6817104152

Or if there is a better one within a decent price range you know of, let me know.

Thanks

IF you dont go with dual 7800GTX just drop the dual gfx setup, it wont be worth it and hyoull save $$ on the adaptor =)...Oh an dnot to mention 1 7800GTX is probly a better $$/performance ratio than 2X whatever

Asus P4P800DX, P4C 2.6ghz@3.25ghz, 2X512 OCZ PC4000 3-4-4-8, MSI 6800Ultra stock, 2X30gig Raid0