Hi all I have a 27" mid-2010 quad i7 2.93 imac with SSD, that is a pretty sweet fast machine. But my need for speed is itching, and I am thinking of replacing it with a more recent version. However, the one I have has the built in optical drive that I use quite a bit, and I like the elegance of the single unit vs. a drive on the desktop. So what was the "Last" imac model, in its fastest quad i7 version, to still have the optical drive built in? This would help me figure out which way to go. Many thanks!