few personal tips:

- i would deffinitelly choose Intel instead of AMD. Intel performance is simply better as they have better technology in multiprocesing.

- if you decide for AMD cpu, then choose ATI graphics and not Nvidia. ATI is now AMD family, NVIDIA=Intel. Ofcourse, it doesnt need to cause any problems, if you buy nvidia grpahics and amd cpu..

- i would deffinitelly go for 2x 750 and not 1x1500Gb HDD

- regarding PSU I think 500w should be ok, as you not buying hi spec graphic card, which is the worst regarding power consumption.