Rolli is right in referring to the TT as the lesser of evils, the implication being that they are BOTH evil.
If you have a HD5670, you would be fine with a 380W Antec Earthwatts. In fact that PSU can handle a HD6770 or even a HD6850. For $45, that's a tough deal to beat.
Sorry bout that, seemed to be a typo. I have a 6870.
Anyway, I'm going to select the best answer now, thanks guys.