I started out with an XS and I upgraded to a 60D. I really liked the feel of the 60D in my hands and what pushed me to that instead of a t3i (newest available at the time) was the 9 cross type auto focus points. I bought the 60D and sold the kit lens and it took a while, but I have a few nice lens to pair with it (a 50mm f/1.4, a 100mm f/2.8L IS Macro, and a 24-105mm). I really really like the 60D. I use the LCD at the top right of the body ALL THE TIME. The 5+ frames per second comes in hand and while the 7D would blow it away with 7 or 8 frames per second, I personally don't miss it that much.
Both the 60D and 7D are due for an upgrade. The announcement could be any day, but you can find very nice prices on the cameras now. I've seen the 60D body alone sell on ebay (new) via Big value for 586. B&H had a deal not too long ago for the 60D, an 18-135mm, and a 70-300mm IS for 1100. If you sold the kit lens and the zoom, you are looking at about 400 for the body alone.
As for the 7D... I think I saw it around 900 for a canon refurb, which isn't bad, but I still think that is too much.
As for the t4i, it has the cross type AF points I wanted in the 60D, and it is much better in regards to video when paired with an STM lens. Outside of that... I don't think it is a big upgrade over the 60D.
The old adage is to buy good glass and keep your body till it dies... I don't disagree with it, though I did buy the body before I bought my nice glass.