How about this:
Silver Stone SST, 650watts, Strider Essential, PSU, 80PLUS gold, pn: SST-ET650-G and SST-ET550-G
*edit: Also this Cougar 650watts, GXS, PSU, 80 gold, pn: CGR-GS-650 within the same price range too.
Found one on my local shop and its just $70.
Will use on a 5 3600 / 5700 set up.