It looks like the OP has made up his/her mind, but at least personally, I don't find having two slow zooms the best choice, at least creatively. But it's clear the OP is looking for range, so, far be it for me to say what people "need." However, even pairing one slow zoom, with one fast normal, or a fast short-telephoto, I think, is just way more fun. When I carry only two lenses for just "walking-around," I typically carry one wide, and something fast (in any combination):
Pair No. 1:
A. AF VR Nikkor 18-55mm f/3.5-5.6G DX
B. AF Nikkor 85mm f/1.8
Pair No. 2:
A. Tokina 11-16mm f/2.8 DX
B. AF Nikkor 50mm f/1.4D
Today, I just happened to bring along "pair no. 1" to work. Nevertheless, I would still highly recommend adding, at the very least, an AF Nikkor 50mm f/1.8D to your kit. At only $115 USD, they're incredibly affordable, extremely sharp, and plenty fast.