19.95 UK pounds is now $157? Amazing
I just researched and bought a seasonic M12 600w to replace my current power supply, a thermaltake silent purepower 480. I'm getting random system problems and after a lot of troubleshooting, I now suspect the power supply.
The seasonics are 80%+ efficient and are typically very quiet. The modular ones have a second fan that kicks on during high load so they're not as quiet as the non-modular ones, but they're still very quiet.
I already have a 430w seasonic PS for my HTPC and it's very quiet, no problems at all.