You have some pretty great lenses that you are trying to sell....why give it up to get a 1D MIII body....just save up for a little while and then you will have a back up body and won't have to change lenses that often. I have a 1D MIII and have the 70-200 f4 L IS USM on it 90% of the time. My 24-105 f4 L IS USM is glued to my 5D MII.