I recently purchased a 7D, which I'm quite happy with so far. I do a lot of nature work, landscapes when I have the time to get out and find them, wildlife and birds most of the time, with a variety of other macro, still life, and even portrait work at times. I've been holding out for a 5D III, however it seems that its release is still quite some way off into the future. I also currently own the EF 16-35mm f/2.8 L II lens, which I've used with my 450D for a while, however it does limit me on the wide end...essentially capturing an FoV similar to that of the 24-70 on FF.
My question is, should I grab the EF-S 10-22mm lens for the 7D, and use that for landscapes? I've heard that lens is optically really great, but I've also heard it has a fair amount of distortion at the wide end. Should I save my money bank it for the 5D III and use my 16-35mm for that kind of work?