Like the guy said "DO NOT CHEAP OUT". A cheap inexpensive power supply will burn out in no time, I have gone through 2 of em. You wanna stick to the more expensive ones, they're more expensive for a reason, they are made with quality parts. I myself use an Ultra V Series 400W power supply that I bought from tiger direct. With power supplies you get what you pay for, so if you pay a dirt cheap price for one, that's exactly what your gonna get.
Also don't buy a power supply simpley because it looks cool, as stated in the sticky linked by Static_11, the lights and other extra things are just gimics to pull you in so you buy a PSU that isn't worth the 80mm fan used to keep it cool. Get a more expensive PSU, it's worth the price cause it's made to work.