you didn't mention a budget, which is usually the deciding factor with most lenses. To be honest the kit 18-55 is really a nice lense. As is nikon's 18-70.
wider is very difficult in the DX format
you could try the
12-24 nikkor which is certainly wide and fairly fast but doesn't "zoom" much and is pricey.
my personal favorite is the
17-55 nikkor. The fixed 2.8 throughout is just amazing. Its also pricey and pretty hard to come by right now for some reason.
The 18-135 is nice because of the range, obviously the 18-200 vr even more so, but I like really fast glass and those two just didn't have wide enough apertures at the wide angle.
Tokina makes a
12-24 but i haven't tried it. Sigma and Tamron both make equivalent lenses to the two above at far cheaper prices, but I really prefer Nikkors.