I'm going to get a 2009 27' i5 imac, and might consider upgrading to a SSD sometime down the road. Now, a few questions. Could I just plug it in to the iMac via SATA and be good to go? If not, could I have it replace the superdrive, and then wire that such that it worked externally, via USB? Also - would it be possible to upgrade the graphics card later? I highly doubt it, but someone mentioned something about it, and now I've got a fleeting suspicion.