Decided to pull the trigger on the full frame upgrade as I found a good price for the 6D w/ 24-105mm. Will be heading to Alaska this September to photograph glaciers and I wanted to make the switch. Couldn't justify the 5D MkIII as I really don't need the AF system.
I am also debating selling my 60D, 17-50 f/2.8 and 70-200 f/4 and using the money to get a 70-200 f/4 IS and a Manfrotto 055XPROB. Will have to see what kind of price I can get for the camera and lenses.
Any other must have lenses you would recommend? Keeping in mind I tend to not need f/2.8 these days. I shoot more landscape and wildlife stuff than anything else.