ASUS P8P67, i5-2500K(or 2400), GTX560ti, 1 WD20EARS, 1 SSD, 2x4Gb RAM, 1-2 USB devices, 1 DVD-RW, Antec P183 case
I do not want to OC right now, because i' aiming for quiet pc, but in 1-2 years, maybe
That build should run fine with much less than 750/850W, i would probably go with Seasonic 560W 80 Plus Gold ATX 12V/EPS 12V Power Supply - X-560 SS-560KM
, out of being cheapest of the Seasonic X series and the fan wont turn on unless it needed. But on P183 (or in my past build antec 1200) i really like the Antec CP-850
, its very nice PSU for that case, specially for the price, while fan is always on, its very quiet, and will give you room to grow for any future single cards might come, and probably SLI and OCing. Personally i really like the looks of the following build, Boring but silent
, in there you can see the CP-850 + P183. Really good reviews all over the net about the CP 850, here some if you wish to read more,SPCR Antec CP-850: Unique PSU with Top PerformanceHardwareSecrets Antec CP-850 Power Supply ReviewJonnyGuru Reviews - Antec CP-850 850W
Btw the Corsair AX series is really good, if you want to go with them should be great also, i just find the CP 850 + P183 a cheaper and good combo.
Good luck with your choice,