Your girlfriend can't decide on her own lenses? It seems like maybe you are trying to be a little too helpful here. I am sure she will pack up the camera gear (if any) that she wants all by herself if you let her.
hahahha. yeah that sounds like me.
I really want to buy her an 11-16. Pair the 11-16 with a 24L on a 7D, that would be gold for HK!