I'm wanting to upgrade my late 2009 iMac with an SSD, but don't wanna pry the thing apart and risk voiding the Applecare warranty which has 2 and a half years left! Has anyone else out there tried booting an SSD this way? if so, what do you think of it? Would there be much performance difference between the regular stock Western Digital SATA HD and a decent SSD in a firewire 800 enclosure? I'd only be storing the OS and apps on it if i did as all of my other data is held on other external drives.