Having studied the specs of the Canon 600D and finally had a chance to use the camera over the last 24 hours I have to say that it is probably the best value for money camera vs specification that Canon currently have in their lineup.
So far I can only see one reason why you would want the Canon 60D instead of the Canon 600D and that is the faster frame rate. Unless you are shooting sports or are particularly clumsy and drop cameras I can see no benefit in the Canon 60D compared to the 600D.
In fact there is one feature that the Canon 600D offers that the Canon 60D doesn't have and that is the wireless flash control. The Canon 600D can wirelessly control EX flash guns such as the 430EX and 580EX which the Canon 60D cannot according to its spec sheet.
For the price I think the Canon 600D is an unbeatable package and by far the best value for money camera that Canon have at the moment.
The Canon 600D also has a lot of features that would be very useful on the Canon 5D Mark II and are likely to appear on the Canon 5D Mark 3, the rotating screen, video crop mode, flash control in camera and additional "small JPG" S1/S2/S3 options will undoubtedly be in the Canon 5D3 spec sheet.
