I have just made the switch from a Nikon DX to M43 based system. Current kit is OM-D and GH1 bodies, 20mm & 45mm primes, 14-45mm & 14-140mm Panasonic zooms. An FL-50 flashgun is on the way. I convert RAW files using DxO 8. I find the DxO lens correction profiles to be excellent. The big catch is that there is no profile for the 14-140mm with the OM-D, but there is for the GH1. I shoot pretty much everything from the occasional wedding, concerts, architecture, landscapes, seascapes, street, family and pets etc. My dilemma is what to do at the long end with the OM-D. DxO has a profile for the OM-D and 14-45mm which meets my wide to moderate tele needs. The primes cater for street, portrait and macro (90mm Tamron with converter). What's missing is the 35mm equivalent of 90 to 200-300mm in a lens that DxO supports on the OM-D. I see four choices: Olympus 14-150mm, Olympus 40-150mm, Panasonic 45-200mm, keep the 14-140mm do corrections manually (not as good though) and hope DxO bring out a profile for the OM-D. Ideally I would like to keep weight to a minimum (the main reason for ditching Nikon). My lens of choice on the D300 & D5100 bodies was the 18-200mm which with the DxO lens correction module was capable of some pretty decent results. However, a two lens zoom walkabout solution plus 20mm & 45mm primes for low light is OK. I'd welcome advice and recommendations from members.