I believe the D200 will also meter with some of the older Nikon or 3rd party MF lenses. Not sure about the D80. I guess it depends on what lenses you want to use or get in the future.
Ken Rockwell did a comparision of the two:
The D-3, D-300 and D-200 wil all meter with the older MF Ai lenses but you have to select the maximum apature from a list in the menu. The D-80 as well as the D-40 will work with these lenses But no metering. Pre Ai lenses should not be used on any digtal camera unless they have been Ai modified. Even then it could be a risk depending on how well they were modified.