Looking at a new iMac purchase soon and I think I am going with 256 SSD rather than Fusion. I will certainly have more than 256GB of data, so that will require external drive, which creates the dilemma of backup, as then I would have to backup the 256SSD and the external drive. Right now, I have all my data on internal 1TB drive (Late 2009 iMac), so backup is really simple. I use SuperDuper and clone my drive to an external drive once a month. Looking for advice from others who have a relatively small SSD, and external drives relative to their backup strategy. Thanks!