According to this :
http://www.tomshardware.com/forum/id-2547993/psu-tier-list.html
The Thermaltake smart series is no better than tier 4:
"Tier Four
Built down to a low price. Not exactly the most stable units ever created. Very basic safety circuitry or even thin gauge wiring used. Not for gaming rigs or overclocking systems of any kind. Avoid unless your budget dictates your choice.
"
I personally would recommend something from tier 1 or 2. The PSU is the heart of your system, without it NOTHING works. It is the only component that, if it fails, can destroy all the other components of your system. Never "cheap out" on the PSU, it is false economy.
Good luck!