I'm building my first computer right now, and i'mgoing for quiet. For PS, i'mdeciding between a zalman noiseless or an enermax whisper. both in the 300-350v range. does it really make a difference which i get? i've heard good and bad reviews for both regarding performance and sound, so i really don't know what to believe. Also, is it simple to change the fans in a power supply? I keep reading in the forums that people do it. would i be able to if i wanted?