Looking to upgrade from my T3i and I have a few questions.

[Kombi]

-How does the 18-135mm compare to the 18-55mm that it will be replacing? Is it the same performance just with more range? Or is one better than the other? Would the 28-135mm be the better choice over the 18-135mm? The wider angle I am losing would not be an issue since I am planning on getting the Tokina 11-16mm down the line.

http://www.the-digital-picture.com/R...ns-Review.aspx

review is of 15-85 but seems to answer all above questions all in one review.

-Any pros the T3i has over the 7D? Other than something to do with weight, dimensions, cost? Other than the VariAngle screen?

No Pros to the T3i over the 7D (Other than smaller body,lighter,less expensive and has VariAngle Screen)
The 7D is better build quality, and weather sealed. Plus has DUAL digic 4 processors as opposed to one on your T3i

I'd consider getting just the body, not a kit, then choose a lens.

I have a T2i and look quite often at the 7d or 60D and debate if I should upgrade.

the #1 reason I would is fps of RAW images.
When trying to capture the dogs playing the t2i shoots 3.7 fps and the 7d shoots 8 fps. essentially doubling the odds of getting the shot I want.