I like the thought of the 100% pixel peepers looking for that sharpest lens ha ha...fretting and fussing over virtually an unobtainable nothing. Maybe the best option is to buy a dozen copies of each lens and a dozen bodies and then cross test them all to get that extra couple of LPM's ha ha ha...and after all that it's brought undone by the shot to shot variation in the AF system anyway ha ha ha ha......
Greg