i'm gonna go pick one of these up tonight...i'm just not sure which...

Butterfly
PurePower
True Blue
True Power or the 430w version...

lemme know...which is best and why

I'd say go with the Antec True power. If you are open to other options, you can get a Sparkle/Fortron from newegg. The sparkles/fourtrons are high quality psu's without the expensive name-brand price. They also have adjustabe POTS to fine-tune your voltage rails.