Before I begin, let me go over a quick synopsis of the camera setups that I've had over the years:
Digital Rebel XTi
40D + 20D (bought/sold a few 20Ds)
T1i + 40D (had the T1i for a day before realizing it wasn't for me lol)
T2i + 40D
T2i + 50D
T2i + 50D + 5Dc (sold all three)
5D2 + 7D
So I've been used to having 2 cameras for a bit. With the 50D, I enjoyed the Magic Lantern firmware allowing me to shoot video on it. After getting the 5Dc, I got hit with the full frame bug and haven't looked back. So now I'm looking to get a second camera, but I am budget limited.
I'm not sure if I should get:
7D (I shoot sports and could use the extra reach and FPS)
5D2 (close in IQ to 5D3 and is FF)
6D (closer in IQ to 5D3)
5Dc (still full frame, don't necessarily need another video body, much cheaper)
Or get a xxD series cam. I'd probably go for a 50D. I don't like the 60D ergonomics.
I mostly shoot nightlife, events, portraits, and sports.