What you want is the best quality you can even remotely afford. I would sugget an enermax or Antec, or Kingwin of at least 450W. There are other brands as well. But you dont want to get a cheapo PSU only to havew it either give out on you or worse blow your comonents as it gives out on you. a PSU with temp controled fan would be nice. And remember a lot of the PSU requirement is going to depend on what you are putting in your system therefore on the PSU.