I have the 18-200. The quality is a bit worse than the 18-105 and it has creep issues, but it is brilliant as a travel lens when you don't want to pack and change multiple lenses.
The nikkor 18-200 vr costs about 1000 sgd. Your likely alternatives are Sigma 18-250 OS and Tamron 18-275 VC. I believe they should cost a bit lesser than the 18-200 but give longer zoom. They are a little slower to focus though.
If you don't need the range, the 18-105 and 18-135 are good lenses. The 18-135 is not VR though. The other option would be the 18-55 + 55-200. Barring the 18-55, the others are around 400-500 sgd.