I bought the 1.2 Ghz Sonnet, and I¹m using it in a Powerlogix enclosure. I¹ve got the Cube Perch just in case, but my setup seems to be ³fanless², and consequently, much easier to install. I hardly run the fan at all, and with the Maxtor Ultra HD, you can barely hear the hum. That Powerlogix enclosure really gives the hot air someplace to go, which sort of what the fan forces your regular Cube to do.