you wont get 5400rpm and large capacity easily. you are correct, but the PC industry is moving the goalposts to 7200rpm especially if you want larger capacities. next gen 7200rpm will make 5400 seem positivly clunky! FDB (fluid dynamic bearing) is absolutly the way......there is a particular manufacturer that leads the field in this area. Remember....a quite drive is only quite if you guard against amplifying seek noise.