I know that the only thing user accessible on the 27" model is RAM. But what do you think the chances are of being able to have an SSD put in internally without having the warranty void? I was really looking forward to SSD in this model, the fusion seems cool, but I'd really love to have a 128GB-256GB SSD only. I don't need 1TB of internal storage. I have been thinking about the idea of an external thunderbolt SSD, which I'm starting to accept may be my only option. I use external drives for all my files/footage, but not even being able to run the computer without having an external drive with OS attached by cable sure seems to defeat the purpose of an all-in-one.