I was looking through some motherboards earlier and I came across this review of a Gigabyte motherboard. Not only did the person try to save a few bucks buy buying a crappy PSU he actually blamed it on the motherboard.
"I bought a Rosewill power supply, first one had a bad capacitor, and ended up frying the first gigabyte mobo with it when I booted it up. RMA'd both, and had it happen again when the new stuff came in. The board seemed highly sensitive to power fluctuations from my second Rosewill RV600V2 power supply. I guess it could be a great board if my two different PS from Rosewill hadn't blown the thing up. The second PS ran, but pushed out some real bad inconsistent power. I can only return it for yet another replacement with newegg, which I'm not going to do. So i'm out the $230 the mobo and PS cost me, plus another $40 in shipping or so."
There is no more important part of a computer than a quality PSU. Every part relies on solid, stable power and a cheap PSU has the ability to take out a whole system. All the models mentioned earlier are good products but I just wanted to mention this in case you were thinking of going cheap.