The D-90 has all the bells and whistles and supports a larger format (true 24x36mm CCD and much sharper images due to more pixels per image %).

I have the D-80 and really like it and I am a lifelong Nikon user that still has my original Nikkormat Ftn on the shelf.

The VR lenses are really fine (I like the Image stabilization for Sports and long lens shiots to lose the vibration and shake) but the Nikon wide angle lenses are the best, the 10.5mm 2.8 Fisheye and 20mm 2.8 are AMAZING in their sharpness. The long zooms (80-200 and 70-300) in the new glass fiber/plastic housings seem a bit light and I tend to use my older D series metal housing zoom (80-200 2.8) instead. The 18-200 is really a nice lens but the design results in a really slow maximum apreture at the 18mm end of the lens. I'd rather have the wider F stop of a wide angle single focal length or short zoom over a small apreture "do it all" zoom.