People cannot predict the future of technology. If they could, they would be rich and we'd never hear from them again. No one can tell what socket will be used again, and which will be put out to pasture.. until the tech news is "leaked" to the general population.
Saying that, an Intel 930 will out perform a x6 1055T in every aspect. Every review i've read, including the HWC review has pointed to this conclusion.
Moving forward, everyone here has basically posted what needed to be posted - all excellent advice. I'd probably drop the PSU to a more-affordable 700W OCZ ModXStream Pro - which was on sale at NCIX for $35 (I picked one up) if you're only planning on one video card.
But honestly, if you're spending $110 on the 750W, you might as well spend the extra $15 now and get the 850W, so you could SLI in the future (if you wanted to go the dual video card route)
And the TX line isn't modular - just a note.. 'cause you're going to have a lot of cables coming out that PSU.
I would recommend getting the CM 212+ now, instead of later.. just cause it's a pain in the butt to replace down the road. It's $22 pricematched.
If you wanted to save some money, G.Skill has some cost-effective DDR3 6GB set for $155.
NCIX.com - Buy G.SKILL F3-12800CL9T-6GBNQ 6GB DDR3 3X2GB DDR3-1600 CL 9-9-9-24 Triple Channel Memory Kit - F3-12800CL9T-6GBNQ In Canada.
The corsiar ram is superior - it's timings are lower.. however I don't like mail-in rebates and the real-world difference is not noticeable.
Have fun!