I'm curious what people use for external storage on their iMacs. I have a Mac Pro which is getting a little long in the tooth. I'm debating whether to get a new Mac Pro or to get an iMac, which would be a pretty good speed bump from my Mac Pro 1,1. I'd get the ssd drive, and the 2TB harddrive and get aftermarket RAM. But what I like about the Mac Pro is the upgrades you can do. And I like the four hard drive bays, for storage and backup. I've got over 3 TB of photos and music/tv/movies, so I'm going to need an external drive. In addition, I'd like to be able to backup everything. Is there an elegant way to do this on an iMac with an external drive that isn't super loud and hot?