That's what I'm using now. The 18-135 rocks as a walkabout lens, esepcially when u cover events =)
I guess the next step up for me will be 18-200VR
Bro, I think you should skip the 18-200VR. In terms of optics, it's only a minor improvement, and the premium you're paying is, IMHO, not worth it. You're getting 65mm in focal length, VR, and a very minor improvement in optics.