While I (impatiently) wait for local dealers to start stocking the E-M1, I'm looking around for a higher quality replacement for the 100-300 that was stolen alongside the E-M5. I don't shoot telephoto very often, but when I do, it's generally wildlife or compressed landscapes. So not things that require particularly great tracking, but it can't hurt. I liked my copy of the 100-300 quite a bit, but I'd rather have a bit more weight, better sharpness and the option of adding a teleconverter. Question for me is whether the SWD version of the 43 50-200 is worth the upcharge over a non-SWD version for an E-M1. Anyone have any experience or ideas on the matter? I have ample experience with the 100-400L on my canon, if that helps with speed comparisons..