get a 500gb hdd if you can, then since you wont be over clocking any 750w is not really good imo, with that set up the seasonic 520w 80plus bronze is a good go for you it should really loosen up your budget, those 2 i mention should help you out
Can get an i5-2500k instead of 2600k, for gaming, no difference cept price. Also get an asrock z68 mobo its 121.99 on newegg. Full featured probably tons cheapers. Get a better vid card. 560 ti is very mid range, get a 7950 or 7970 for future upgrading. Can squeeze it in with the saving from the CPU and mobo.