Only getting back to check responses now (damn puppy!) so thanks for the advice guys.
Reason I'm asking is cos my dad is thinking of getting a new build and I was considering putting my current Corsair TX650W in that if he goes ahead with it, and replace it in my own build with a modular unit.
It's as good an excuse as any to convince myself to buy unnecessary equipment, and it'd save him a few quid for a good PSU that's less than 6 months old.