Don't get me wrong - I am in love with the whole mirrorless concept - but I havent made the jump ...yet. Why? Money - let's be honest is big reason. Where I live even a second hand GF1 body sells for nearly $700, and the cheapest lens is about $300. Even more for a NEX or a PEN combo. So when I needed a second camera (to back up my K7) for some upcoming weddings, an M43 body and lens was way out of my budget. And as much as I love Canon G-series powershots they are commonly $500+ and can't offer similar IQ to the K7. So I tracked down a secondhand Pentax *ist DL with kit 18-55 AL zoom for a modest $450 - cheaper than a used G10! Yes it is "only" 6MP, but I get good OVF, good AF speed, useable 1600 and runs on AA batteries.:smile: And compatibility with my current Pentax lenses. Of course if you took the money reason away, then the issues would be different like: where is a WR sealed mirrorless body and lens? How good is the LCD in bright daylight (my K7 LCD is useless for video on a bright day ...) and is the AF quick enough?