After much debate, I decided to make the switch to m4/3. My former system was a T3i with a Tamron 17-50 2.8 non-VC, Tamron SP 70-300, and Speedlite 430EX ii. I was basically at the point where I wanted a faster prime for videos and a replacement for the 17-50 which I found a bit too slow in AF and speed (but good sharpness). So I was looking at picking up a Sigma 30mm 1.4 and Canon 15-85. That was when I decided that something more compact would work better for my major subject- my family. I am in the process of selling my Canon gear, but realistically expect to get in the range of 900€- after fees and shipping. If I'd bought the other two lenses, I'd have been in another probably 450€- or so (600€ for the lenses but recouping 150€ from the 17-50). Even though I was convinced that I would buy the OM-D, I saw the G5 on sale for 330€ w/ the kit lens and, after tons of research, decided to bite and to set up a prime kit. I have since purchased the 14mm (100€), 25mm (320€), 45mm (230€) and the 40-150 (40€) as well as the Nissin Di466 (60€). All told (after shipping), I've invested about 1200€ in my new system. The biggest adjustment for me was the move to a prime setup. I feel like I've learned so much about photography by having to work within the confines of a particular focal length. Framing, bokeh, shutter speed, light... my pictures are better and more consistent by a mile. Of course switching lenses is a bit of an annoyance sometimes, but it forces me to think proactively about what I want to accomplish. I love the layout and interface of the camera, the swiveling screen, electronic shutter, handling, and portability. I have my entire system in a small Crumpler bag which I modded to hang the two prime lenses by taking a sock from my 2 year-old, cutting it in half and sewing it inside. So I just wanted to say a general "thanks" to the folks here for providing a wealth of information about these systems.