OK, I'm sure there have been plenty of 5D vs 7D debates.
Now, I figured that the crop factor of the 7D would be ideal for many situations, and would help me get that extra reach, while only the 5D it would be easier to go wide.. but, I could always get some wide lenses like the Sigma 8-16 that would be perfectly fine on the 7D.
Portraits and landscapes look more dramatic on the full-frame sensor, and I get better ISO.. sure, but is it really that much better? I'm a student so I can't afford both, and the other issue is I don't want to buy used items (since I can't recall seeing a 5D used somewhere, and I can't afford the 5DII) due to bad luck with the last flash I bought used. Also, going full-frame would mean I would have to replace ALL my lenses..
The main thing that wants me to upgrade my XSI is I long for a better AF, and I heard the 7D has better AF. I'm currently fine with my lenses, the only one I'm really eyeing is the MPE 65.