you will be happy. (See my post on T4i vs 60D)
I was tempted to buy the T3i to save a few dollars, but cameras are computers w/a lens and whatever you buy becomes "obsolete" quickly, in terms of features. It doesn't pay to buy an older model, because you start out behind the curve., yeah, I know that these changes are very incremental and image quality isn't changing so fast, but my evaluation was that the T4i beat the 60D in many features(not all). The live view/touch screen makes live view a much better option than it has been, and the speed has been decent in the right conditions.
Also the 18-135 STM which I did not mention in my other post has surprised me...way above the 18-55 IS imho. My main lens is the 15-85 IS USM, which is super sharp. The STM has been fine.