One of the biggest ownership dilemmas I ever had was between these two cameras. I loved the silky smooth shallow depth of field image from the 5D Mark II and the fun factor of the very usable Panasonic GH1. The low light performance of the 5D Mark II was completely absent of banding and colours looked incredible on a big screen. The GH1 had a significant cost and handling advantage plus some ‘interesting’ lens options. Hours spent hunting down old Canon FD lenses and C-Mounts!