It took a fairly long hike recently to make me chafe at carrying around my 50D and multiple lenses. It was a thing where the annoyance started as a whisper, then grew to a full-on shout in my head. DUMP THIS PIG! But to what end? I poked around for smaller offerings, and quickly came to MFT's. Tired of being locked into the neck-hold of Canon (or Nikon for that matter) I was quite pleased to discover a platform established and supported by multiple manufactures. The lens is the thing. I haven't yet parted with the Canon gear. That ball should get rolling fairly quickly. I'm quite happy with the performance of the 50D and lenses. I'd gotten sucked in by the siren song of bigger/better/faster photo gear. I bought straight in to pixel peeping. Buuuuuuut my prints rarely -never, really- exceed 8.5 by 11. Well, duh. I have so many shots that I can't imaging making any better on a technical level. Why go FF? Upgrade to what? DPReview (IIRC) had RAW files downloadable for 50D and GH2. I downloaded into LR and compared on a couple of different ISO settings. GH2 wins or is equal to my eyes. Also in my research, mostly in reviews, I found a number of folks leaving Canon. I laughed out loud last night when I read a review on Amazon for the Panny 100-300......a guy was complaining about his 50D and 100-400l. I could have been the fella writing that. Heavy! Yes, it is. And gripped, it is even a little worse. It is like having a SUV around your neck. It's probably a good month or so until I can transition to a GH2. Until then, I'll be happily hanging around here with you fine folks. In fact, I've been lurking for a bit and appreciate the good atmosphere. I write badly because I type badly. That, and I can't streamline the 15 things I want to say all at the same time. Oh, and Canon....don't bother with smaller lens changers. We know you'll only go proprietary and try to crowd out everybody else. Great product lines, but glacial progress. Bye.