Ok so I have a 2011 iMac with a 1 tb Hdd. I'm wanting to get a external ssd with thunderport to put my bigger programs and files on mainly final cut and hd video. Would it be faster due to the thunderport and the ssd at booting rendering etc than my HDD internal? Don't want to void my AppleCare for a internal ssd install. Also could I just load mountain lion onto the external ssd for faster booting and all the ssd benefits?