Thermaltake Toughpower TP has never been on anyone's top PSU lists
Coraie CX is Corsair's "Builder" (read budget) series
The XFX Core Edition usually gets 9.5 performance ratings from jonnyguru but this one garnered only an 8.5
Id grab this 750 watter for $70
http://www.newegg.com/Product/Product.aspx?Item=N82E16817139021
CORSAIR Enthusiast Series TX750 V2 750W
$140 MSRP - $30 newegg discount - $20 off w/ promo code EMCXSXS29, ends 4/10 - $20 MIR
$140 PSU for $70
Platinum, Gold, Silver , Bronze DON'T MEAN BEANS to your PC components .... I mean it's a big whoop to the tree huggers (myself included) but doesn't say much about power quality, voltage stability and cleanliness of the power. All it does mean is how many pennies per monthyou save....and yes I do mean pennies.