I went through the same thing ~ a month ago and here are some specs on PSU's that you might be interested in:
Corsair TX750 - $89.99
+3.3V@30A,+5V@28A,+12V@60A, -12V@0.8A,+5VSB@3.0A
Corsair TX850 - $109.99
+3.3V@30A, +5V30A, +12V@70A, -12V@0.8A, +5VSB@3A
Corsair 1000HX -$219.99...