thanks all
looks dont matter at all to me, the standard thermaltake ones i got in there at the moment have got blue LED's in them so we cant get any sleep at night anyway if i leave it on, which is a lot of the time thinks to my work.
bit low on cash so thats why i asked if anything out there is as good as the Noctua's
have any of you lot ever undervolted your fans? if it worth it then its no prob fro me to do