Fortron (who also makes Sparkle), PCP& C, Seasonic, and the OCZ Powerstream (not Modstream) lines are all pretty much rock solid with PCP&C pretty much being the top of the heap.
With that setup I would probably look at the Seasonic S12-600 or the Fortron FX600-GLN unless I absolutely had to have the top of the line which would lead me to getting a PCP&C Turbo-Cool 510 ASL or the Turbo-Cool 510 Express SLI
The Sparkle that Zepper referred to would be the best bang for the buck if you want to stay sub $100 however.