I'm looking to set up a 4+ drive external eSATA raid system (likely raid5). My biggest need is QUIET. I've tried 2 boxes thus far including the 4big quadra that was supposed to be engineered for noise, but it had an annoying fan speed fluctuation and was actually much louder than my mac pro. I have a drobo and that is also too noisy. I'm wondering of anyone knows of a box or other option that is either fanless (ideally) or has one large super quiet fan. appreciate any help.