Thank you very much for all the replies! Looks like it's down to the 15-85 or the 10-22. I'm a little hesitant on the 10-22 because it seems to be an ultra wide. I've never used anything wider than my 18-55.
I appreciate the the tips on AC as well! We will be going in Sept. 2014 and I need to get a lens and do some practicing before we go.
I felt the same way you did...you'll be amazed at how close to subject you can get (and still get all in frame!). It's a very useful lens to have in the bag.