Your stated conditions are (1) <70mm (2) wide-angle (3) any brand (4) sharp (5) light-weight and (6) digital body. Mm....
Then I would like to ask these questions
(i) What is your application like? Sport? Wedding? Portrait? etc.
(ii) Mostly indoor or outdoor? Flash or non-flash?
Based on your stated condition, you may want to consider "
AF-S DX Zoom-Nikkor 18-55mm f/3.5-5.6G ED". Cheap, green (as in good), near "road side" (as in readily available) and inverse BIG (as in small)