Can't find much except for the 27 inch iMac, does anyone know if it's possible to do an SSD+HDD combo in the 21.5 inch iMac? I am currently selling off my desktop to either get a refreshed Mac Mini or a base iMac, and just wanted to know if that's possible. Even if I have to remove the SuperDrive I wouldn't mind that. Otherwise, will I have any problems changing the stock HDD to an SSD and just having a 2TB external for my data? Thanks.