
Originally Posted by
GrumpyDiver
While I shoot primes on occasion (I own four of them for my Nikons), most people find them quite limiting. I personally would not go with the combination you are looking at as the 70-300mm on the crop frame sensor will give you a full-frame equivilent of 105 - 450mm. This is not a range most photographers will shoot. It can be used as a portrait lens, but is a bit slow at the long end for wildlife shots (I own the 55-200mm; the 55-300mm was introduced later). I would not bother with the 55-300mm as I'm not sure what it will buy you.
The two lenses I use most on my D90 are the 18-55mm and my pro f/2.8 24-70mm. For street photography I use the f/1.8 35mm, just because it is fairly small and unobtrusive. My wife shoots virtually solely with her 18-200mm (she has a D90 too); so if you were looking for an all round lens, you might want to think about it, but frankly, you already have those focal lengths and the two lenses you have actually perform a bit better than it does.
Like Alan, I like super wide angle lenses and shoot the f/2.8 11-16mm, but it is not an easy lens to use and might not be one you get a lot of use out of.