I'd go with this board:
Good overall reviews, and Foxconn is coming on strong.
Your CPU will come with a cooler. Use it, as the one you have probably won't fit, and it wouldn't cool it enough anyway.
A new PSU would be a good idea. get one that puts out about 100W more than your graphics card needs. Look for one from Antec, Fortron (I think), ThermalTake.
That mobo can run dual channel, so 2x512 would be better. Try these:
GSkill is a name you can trust.
I doubt that the other hardware will affect it. the hard drive is probably a 7200 rpm ATA, which is still one of the standards.