I planned on keeping my 7D though. My wife said I can buy the 5D-3 but wanted to make sure at least some of my lenses worked still with the 5D.
What do the S lenses have that the 5D does not like I wonder? Is it the mount ?
your 50 and 100-400 boh fit the 5d3 and you're about to see just how good they really are.