I left FF (FX, D700 to be exact) in late Summer and picked up an OM-D. Love this camera, so much fun. It's lived up to my expectations and then some. I've had the privilege of owning quite a few Oly and Panasonic lenses (PL25, Voigtlander 25 - gorgeous, 45/1.8, 75/1.8, 14/2.5, and just recently 17/1.8) and I have a friend who shoots M43 too so I've gotten my grubby paws on a 12mm f/2 and the 60mm macro as well. this camera simply rocks, and it does 80% of what I'd like it to do. But sometimes, I just yearn for FX. Bear with me: I love, love, love fast wide primes. My 35mm f/1.4 and 24mm 1.4 made me smile just to mount on my D700. The subject isolation, the bokeh, the "3D feel" everyone speaks of. M43 doesn't come close to that. Closest it came was the Voigtlander, which cost me $1k new and was manual focus. I've been eyeing the 17.5mm but I just can't justify that price for an MF lens with my income right now. I just received my pre-ordered 17mm f/1.8 in the mail and while its a nice lens, there's absolutely zero subject isolation or 35mm feel I've grown to love in a lens. I also like shooting available light, and the noise (especially when pulling blacks) from the OM-D sometimes bothers me. I feel that even at ISO 200 I'm noticing noise that wouldn't show up in a fullframe body until ISO 800. Maybe I'm paranoid. Lastly, the AF system in the OM-D, while amazing, bothers the absolute hell outta me. Why didn't olympus think about changing the AF point size? I know you can on the touch screen, but it's infuriating when you check your pictures and the background is in sharp focus, your subject just a bit blurry - because the camera was racking focus between background and subject - that AF point being too large. Right now I own the following: OMD/grip 17/1.8 (just got it) 45/1.8 75/1.8 What I would get if I sold/traded the OM-D D600 Sigma 35/1.4 *swoon* Nikon 85/1.8G So we're looking at the same value here. Oh, and last but not least, I have a stockpile of old Nikon AI-S glass: 28/2.8, 50/1.4, a tele and a macro, so that factors in. I can always adapt these lenses but they won't have the same feel as they would on FX obviously. Will I really see a huge difference in image quality? Has anybody gone back and missed your trusty OMD? Input greatly appreciated!!