So originally I was going to get an SSD installed in the 27" iMac, but from what I've read on this site, this will not be an option (other than the insane $1300 option). Since the new iMacs are all friction-stirred up, I doubt it will be possible for me to replace the drive on my own, correct? So I have the choice of either sticking with the HDD, or spending the extra $250 and getting Fusion. Well, for $250 (or there abouts) I could set up a small external TB SSD and run my system off of that, and this would give me the option of easily upgrading my SSD in the future (as SSD prices drop in two or three years). Any thoughts? Would this work? Anyone else thinking the same thing?