Quote from Billdev:
I was looking for an upgrade for my 40D with better AF and more cropability for nature shooting, and the 7D has proved to be the perfect camera for my needs. Everything about it is better than the xxD cameras I have used, and it truly represents a new category from Canon. The AF system is far more sophisticated than xxD and xxxD cameras, and it seems some folks are having difficulty mastering it. I have found it does an excellent job once you learn how to properly use it. Love it more each time I use it.
End of quote.
I do agree with this one. The focus has a lot of features to get them set-up. But ones you have dealed with this it is a great set-up for sport and fast action shots.
The building quality is very good. I used it with a 70-200 F/4 IS in rain without being afraid of harming the body
The quality at high iso is a major step forward at 18 Mpixel when comparing to a 40D. But it is only noticable in DPP.
LR 2.5 is working with a beta-profile so I could not tell more about this. The only thing that is important is that you have more detail in LR when shot at 1600 iso. The noise reduction in DPP makes the picture more softer.