Personally, since lenses are generally more important than bodies in the long run, I'd go with the T3i + 70-200mm f4 (and upgrade the body later). Or really try to stretch my budget now and get the 60D with the same lens.
Completely Agree - I have the 70-200 f/4 IS that was $800 second hand. And if you get a cheaper body, you will get very good images. Then as time goes on by, the body will become less important and you can upgrade. People I notice tend to either NEVER or rarely upgrade their lenses. Its the body that gets replaced every few years. Sometimes the body gets sold or given to someone who wants to get into photography, so lets say you have a friend who likes to take photos, you can sell the body then get yourself a better camera and you keep the lens.
70-200 f/4 is great but if you want to get the version with Image stabilisation, the extra 200 bucks is well worth the price. And if you can find one on Ebay, its normally between 800-900 bucks you can purchase one for. Leaving enough for a 1100D or a store that still has a 450D or a 500D at cost.
In my experience, I sometimes wish I spent more on my first lens than I did on the body.
1) Olympus OM1 [Zuiko Auto-S 50mm f/1.8]
2) Pentax MZ-60 [Sigma 28-90 & 100-300]
3) Canon 7D [EF-S 15-85 & 70-200mm f/4 IS & 50mm f1.4]
4) Leica M [50mm Summicron Pre-aspherical - Silver]http://www.poetproductions.net