If you seach with google enough you can find a review in german i think it was comparing an antec PP412X an enermax 350w and a zalman.
The noise went enermax>antec>zalamn
The PP412X isn't one of those truepower ones so ... but whatever.
BTW zalman vs pcquiet doesn't matter, they're like exactly the same. Zalman had some sorat low voltages, like 4.96 instead of 5 (OMG NO!) hehe but that and its only a 300w ps, i got a pp412x which i'm really happy with.
the new antec powersupplys can't be any worse than the pp412x so i'd pick the truepower