Before I buy any lens, I ask myself two questions.

1) What kind of shots am I wanting to use it for?
2) How much am I willing fork over for it?

It sounds like you have #1 answered for the most part, but maybe expand on it a bit. How wide of a wide angle are you looking for, how much on the other end do you want (50mm?, 70mm?) or do you want it to be fixed?. And how fast do you need the lens to be?

For #2, do you want best bang for your buck? Are you looking to upgrade to pro level lenses? There really are decent lenses in every type of price range, but not knowing what your min-max is, the lens suggestions can be quite numerous.