i used my 24 2.4 all night. transferring 20,000+ raw images while installing CS3 and Lightroom, while importing my old library of 7,000+ songs and i didn't hear any noise whatsoever. totally silent.
ps: while doing all this i still got a geekbench score of 2232 and when i stopped doing these processes it got 3372, that is with only one gig of ram right now too.
and for those who fear the glossy..... it is wonderful. so much better than the mbp/mb gloss because of the glass. the whole time i worked on the system i did not notice that it was glossy.