I'll admit, I looked at the izilla and thought it was real. (you know, those elitist mac people who are also elitist about audio and think if its not on vinyl, it sucks. I could see that crowd buy it) once I saw the other 2 i started scratching my head. my first hint was that they were 400 watts and I think usb is limited to like less than 10, plus most computer power supplies couldn't even provide that, then I started noticing all the other funny stuff like "don't sue" on the microwave extention cords. hehe