Depends on what you are going to be doing with it. 20$ for 550 watts may look good, but chances are it won't be very stable. And with only 25 amps on the 12v rail, it won't be very good. I would get an Aspire or Antec Smartpower PSU if you really are on a budget. Or get a cheaper mobo.
hmm, idk, it looks ok, got good reviews and all, but the fact that it's only 20 dollars made it look fishy. If you're on a tight budget, look at some of rosewell's powersupplies, those are quite cheap but still pretty nice.