Shun Cheung , Jan 16, 2011; 07:36 p.m.
On a DX-format body, definitely get a general zoom that starts around 18mm. 28mm is not very wide on DX.
If a lens is not long enough, you can always crop. Cropping is not ideal but you can still get the image you want. When a lens is not wide enough (i.e. too long), you are essentially stuck.
However, something that starts from 18mm and ends at 270mm is beyond extreme.