Beginner Camera?

[endofnight]

Thanks for all the info guys! I am getting closer and closer to my final decision. I have decided against the D90. That leaves me with:

Canon t2i vs. 7d

Just a couple more questions. Can both cameras swap lenses?

If I buy the Canon t2i which lens would be the best for me to buy? I obviously cannot afford a bunch of lenses, so which lens do you feel is a "must have."

If I buy the 7d which lens would be the best for me to buy?

Thanks again!