What about a plain and simple 50 1.4L? An updated version with better focusing, build, and image quality? IS would be nice, but that would jack up the price a bit. It sucks that you have to spend almost $1,500 for an L quality 50mm prime. I'm sure many people would happily pay $800 or so for this. Add IS and make it $1,000 and you really have a winner.