Congrats on the purchase, Tom! The XT should serve you quite well. Don't be afraid to look at third party lenses when you decide to upgrade/expand your collection. Sigma, Tamron and Tokina all have quality offerings, often at significant discounts to their Canon counterparts (the Sigma 70-200 f/2.8 might interest you further down the line). But I'll let you recover from this purchase before aiming your wallet towards other things.

Be sure to share your pics!