Thanks. For now, I am going to keep the 7D to use as a 2nd body for wildlife. Whenever we travel to a wildlife destination, such as Yellowstone, I end up switching lenses way too much, since I keep the telephoto lens on when we are driving around and have to switch to a normal lens whenever I would to take a landscape shot -- mountains and waterfalls will wait for you to change lenses, but wildlife will not. Also, the crop sensor works like a very advanced 1.6x teleconverter, so I get more reach out of my telephoto lenses. If I end up not using the 7D enough to justify keeping it, I can always sell it later. However, I am going to sell my two EF-S lenses now -- the 17-55mm f/2.8 IS and 10-22mm.