T3i, received on on 1/4/12
Sold T3i in May 2012: wanted the better battery, better AF, Kelvin Temp WB of the 60D
Bought a 60D in May 2012
Ready to upgrade to a 5D3 as soon as I have the money for the better AF, better IQ, Low light performance. I've seriously considered the 5d2, especially for the prices I've seen recently (as low as $1499 new) but the superior AF and even better low light capabilities are making me lean toward the mark 3. Honestly though, It's hard to justify unless I get a smoking deal on the mark 3. I find that I'm liking how I use off camera flash more than relying on the high ISO capabilities of a camera so a mark ii might just be enough for me.
I think upgrading bodies depends on the needs/skills of the photographer. I outgrew the t3i after a couple months of owning it and using it. Between January and May, I purchased the 50 1.4, 24-105, and 10-22. I bought the 35L with the 60D for the double rebate. Since then I purchased a, 40mm 2.8, a 70-200 2.8 IS II, 1.4x III TC, and some Kenko extension tubes.
I think I went a little crazy on the purchases but my 1st 3 lenses were bought used so It wasn't that bad. The bodies are another story. When I realize what my camera can't do, I start researching better bodies. I think i'm a pretty quick study when it comes to tech so my needs grow every time I do a shoot and realize I've got a problem that I just can't find a solution for with the gear I have.