I’ve found a good support for the choice between Canon 60D, T2i and 7D.
If you are looking to upgrade your equipment, on this Review you will find some useful pointers.
But at the end …all depends on what your needs are.
Thephoblographer

Canon 60D: B&H Photo, Amazon USA, Amazon Canada, Canon Canada, Canon USA Canon T2i/EOS 550D: B&H Photo, Amazon USA, Amazon Canada, Canon Canada, Canon USA Canon 7D: B&H Photo, Amazon USA, Amazon Canada, Canon Canada, Canon USA

Mark Goldstein from Photographyblog tested the Canon 600D: “In terms of the competition, things have heated up since the 550D / T2i was launched, with Sony in particular putting the cat amongst the proverbial pigeons with the video-tastic A55, while Nikon’s older D3100 looks a little less tempting now in terms of features but is cheaper, not to mention some of the better and crucially smaller compact system cameras. This mid-range area of the market has certainly become very competitive in the last 18 months. Despite that, the Canon EOS 600D / Rebel T3i cleverly occupies a position that’s mid-way between the 550D and the 7D without being subjected to a price increase on launch. It’s the most capable yet friendly Rebel yet, and easily worthy of our Highly Recommended award.“