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I'm debating between the same models! Seems like the t3i is a little too new to have any solid reviews but I found the comparing option on canon's website to be somewhat useful....
I'm not extremely camera savvy yet, but the file sizes on the t3i are the same as the 7d. Otherwise I'm going to wait for more reviews to come in. Good luck!
not a whole lot of difference... as for the 60d, read the t2i vs 60d thread. after reading it, i'm going between those. probably the 60d because i'm using it more for photog than vid