Gonna be building my cousin a PC pretty soon and need some fans. Looking for something that will keep everything cool, but at the same time quiet. Would like to spend around $10-$15 per fan. Should be black. If it's mullti-color or has LEDs must be black/blue. I like the SilverStone Air Penetrator AP121: http://www.youtube.com/watch?v=8m8fC809TK0 Any suggestions?