I'm tempted not to post this for gear of starting the age-old debate, which is better yadda yadda.
What I am looking for is advice from people who shoot with 2 cameras, one ff and one crop. Lets start this thread with the pretense that each camera has its benefits.
When do you find the crop works better for you? Do you consider it for formals because of its greater dof? Or more reach?
I find it very hard to use my 40d lately after my 5d2 purchase, and want to shoot with 2 bodies, and looking to upgrade to a 7d. Although I know the 40d is a great camera, the 7d offers better af (which would obviously be a plus, especially if im starting to shoot some more sports) and a better lcd screen (which surprisingly has become very important to me) That way I'll have an extra camera on me if anything goes wrong, and one in the bag.
Im trying to justify buying a 7d, and I have the money to do it soon.

