I started with a T2i and then moved to the 7D. I still use the 7D, but purchased a 6D for the low-light performance I read about in the reviews. Bottom line it's going to take a lot to separate me from my 6D. I do use the 7D at times when I want the extra reach and I have good light, but the 6D is the go to camera.

I no longer have any problems with noise in my images - the low-light performance is OUTSTANDING. It is a basic camera it does not have the AF and bells and whistles of some more expensive choices, but I use it outdoors for wildlife all the time without any problems. I am still experimenting with different types of photography and it just gets the job done. I am very happy with mine. Hope that helps.