Considering NEX-5n... What Accessories/Lens Should I Get With It?

I'm back from the Honeymoon, and I figured I would drop some of the pictures that I took.

Feel free to critique as I'm a complete rookie at this right now.  I just figured out how to assign the custom functions a few hours ago. (sure would have came in handy on the trip).  Oh well, here we go.

http://www.flickr.com/photos/kenctures/