ADDITIONAL COMMENTS: This is what I am looking at so far, it comes to about $1200 total though I'm not set on anything. I am mostly concerned with getting the most out of my money, if I can reduce the cost a bit that would be wonderful but not necessary.
Also will the 6 core AMD outlast a Intel Core i5 750? And could you recommend a motherboard with it?
IMO, you are planning too far ahead in the future. What we suggest now will not be the best deal to get in August or September. Technology changes fast. AMD and Intel rollout revised CPUs constantly (just look at the new AMD 960T just released, after the hexa-cores) in addition to new CPUs ever so often.
HD: Look at the WD Caviar Black series; high performance and 5 year warranty.
GPU: Debatable. Buying now, I just picked up an AMD 5870. A few months from now, who the hell knows what I would get?
CPU: Debatable. Buying now, I just picked up a Core i5 750. Better performance per watt than high end AMD chips. If you do heavy multithreading, then yeah, I would consider the hexacores from AMD. Overclocking, maybe the Core i3 series. A few months from now, who knows what will be good.
MB: Get an 8xx series MB if you're going with AMD, 7xx series is old.
PSU: I hear multi-railed 12V lines aren't as stable as single rail PSUs. Reason being you have to manually figure out your load so you don't overload a rail. Perhaps look at a single rail offering.