I am looking at finally upgrading my 2008 iMac and am looking for some buying advice. I have noticed that I will be connecting a few external USB devices to the iMac and thought it would be a good idea to get a self-powered USB hub. I want to make sure I get one that doesn't slow the USB down. In other words, I don't want to drop down to USB 2.0 speeds. I plan on connecting iPhones, iPads, printer, scanner, DVD/CD players, USB drives, and external hard drives to the USB ports. One of the HD's will be my iTunes and Photos libraries and another will be a backup. I have also seen some threads here mention that some hubs cause interference with bluetooth. Is that still true? The posts I read were a few years old. I have seen a Sabrent hub on OWC that seems like it might work. But before I make the jump, I wanted to seek the knowledge of gurus here on Mount MacRumors. Thanks.