Wedding, if you pay attention to image quality and high sense, buy Canon 6d, Quan Huafu, very easy to use! If you are looking for speed and snapshot, choose Canon 7d, the former was released on 20 12, and the latter was released in 2009. I suggest the former. I bought one as my backup machine, the picture quality and high sense even exceed 5d3, and the body is much smaller and lighter than 7D3!
Below are the posters of 6d and 7d (7d is the broken chicken head, 6d is the whole phoenix tail, 7d is 15-85 sets, 1 1000, 6d is 24- 105 sets, 15000).
You can ask me if you don't understand anything.