I skimmed this real quick so I could reply.. and what I caught was, your options are 50D for a t3i? NO! Unless video was something you mostly do, and I also caught its not, correct? I have a 50D with around the same shutter count as you. 50D is a great cam, its durable magnesium alloy body is a tank. The Rebel line is for beginners who shoot pictures of their families at theme parks. 50D shoots much faster, the build is better, focuses quickly with good focus points - its an all around better camera. This might even help you -
Canon T3i vs 50D - Our Analysis
To me that report is rather strange, IMO 3 of the most important factors are won by the T3i although it lost the total count. The t3i has better color depth, better image quality, higher resolution, more dynamic range, and lower noise at high ISO. I don't know about you, but those are pretty friggin huge factors when it comes to a camera. The only big factors the 50d wins is it shoots faster (are you shooting alot of sports? If not who cares) and it has a pentaprism, and more cross type focus points.
I don't get snapsort sometimes, to me if I'm reading that article the clear winner is t3i, after all when it comes down to it, the image quality is what I'm most concerned with.