I have the D40 with the 18-200VR glass and all I can say is that it is incredible

I also own the Sigma 10-20mm lens which is a very nice lens for the price for doing ultrawides.
Here's a couple of shots I've made: with the 18-200, the St Joe lighthouse in SW MI
Here's a classic Chicago skyline with the Sigma 10-20 from the Planetarium.