17 x 9 is pretty much the standard aftermarket size. The stock tires will fit on there perfectly, they will just sit a bit farther out.. and look better (imho).
This size wheel will also let you move up in size of tire and width if you so desire. If you are at all concerned post the wheels you are looking at post them here and we'll take a look. Especially since some web sites are not very clear on what you should buy with regard to bolt pattern, backspacing, etc, etc.