I've been using the Olympus OM-D E-M5 since launch and love it, but find its focus aid very fiddly with manual lenses. The zoom is difficult to launch and navigate, slow to respond, and too jumpy shooting a 100mm equivalent lens handheld. I'm considering upgrading the body or adding another camera system into my gear just for that feature, unless there is a good solution in the micro four thirds world. Which MFT body has the easiest, fastest and most accurate focus aid? And a bonus question: are there any MFT bodies with dual memory card slots, except the rumored E-M1 mk II?