Need advice on a good walk about lens

[sky6108]

Hi all CSers,

Need some advices on which walk about lens to use for a D80?
1. Nikon AF-S 18-70mm f/3.5-4.5G IF-ED DX
2. Nikon AF-S VR 24-120mm f/3.5-5.6G IF-ED
3. Tamron AF28-200mm F/3.8-5.6 XR Di Aspherical (IF) Macro

Or maybe can give other recommendations on other lens in use beside those i suggested.

Thanks

Why not get the 18-200 as a walk about lens?