I have a D300 and am currently using a 24-120mm 1:3.5-5.6D lens. It's terrible in low light, so I either need to get a faster wide zoom lens or a VR lens. I have the added constraint of shooting in very dusty locations, so I'm looking for as close to an all-in-one lens (let's say effective 24 to 150) as possible, rather than switch lenses and risk filling the camera body with dust. All the reviews I read for VR lenses - Nikon as well as Sigma and Tamron - indicate that these lenses have significant distortion problems. I'd like to minimize the amount of correction I have to do (and with the film lens I've actually found very little distortion). So with all that, does anyone have a recommendation on a versatile fast and/or VR zoom lens?