Under 120 would be preferred. I would like to do modest to moderate overclocking if possible. I have no idea about brands or models, aside from wanting z75/z77 chipset. Most get 4/5 stars(or eggs) with many users disgruntled about RMA ruining scores, so it is hard to tell what to get. I may crossfire in the future, but it is fairly unlikely. This is the build I have so far:
Thank you for the suggestion; I will get that motherboard. I just added the power supply at the end because I couldn't find the one I planned on. I planned on getting an Ultra OEM 700 Watt off of TigerDirect. Also, I don't think 500 Watts is nearly enough, as the 7870 Tahiti eats a lot of power and I plan on overclocking some. I could very well be mistaken though!
It's enough, what counts is the amps of the psu, the cx has for a 7950 or even 7970, don't go with generic psus just because it has more watts and it's cheaper.
Get a decent one within 500-600w, like the corsair cx500.