I agree about the repairability. The iMac also gets a speed bump with SSD, but as we all know you have to have some gusto to want to take off that hermetically sealed glass panel. A 27" is the only thing I'd bother opening up to upgrade the RAM and HDD, and in most cases it's still a headache with the level of paste, glue, and tape Apple uses to hold a $3000 machine together.(and the 24" before it).