Thermaltake is decent. But honestly, like i said you need to go with reliable brands. Both Corsair and Seasonic are well known and trusted in PSUs. I wouldn't recommend buying anything else. I've build many rigs and always used Corsair/seasonic and never had any issues!
Seasonic also makes XFX psu-s and they are a bit cheaper than seasonic ... also Rosewills capstone 750w psu turned out to be really good quality as well