Thanks everyone for helping me with this issue.  I ended up with an S5 now (Bitmain replaced my S3 with S5 after a series of follies on their part that caused substantial delays in repair).  I think I am just going to get the 1000 watt Bitmain PSU for the S5 (http://www.ebay.com/itm/Bitmain-Antminer-S5-1000W-PSU-Power-Supply-complete-kit-to-power-a-Antminer-S5-/171905659195?hash=item280660313b) and then get another S3 for the PSU I was using before for my old S3 that broke.  Seems like the safest way to play this and will also be very profitable.