I shoot with Canon, so you'll have to forgive me for not being too familiar with Nikon lenses. What lens or lenses do you currently own?
With your price point, you have a few (yet limited) options available to you. Also, you have to consider that since your D90 is not FF, even 17mm isn't truly that focal length on your body. With that said, I would consider looking at the 18-105 lens which is listed on Nikon's web site for $399. If you wanted to spend a little more money, you could go with the 18-35mm, but the MSRP on that is $669. Around the same price point is the 24-120mm and 16-85mm. But again, you don't have a ton of options around the price point you're looking to spend.