Hi there, I have a pretty similar set-up from yours (less the longer zoom). I was using a D70s before buying a D80. Thought of going for the D200 but decided against it given the price difference between that and the D80. Used the money to buy air tickets to Sydney instead.
Main reason I bought the D80 was not so much for an upgrade, but to get another body as there are two users in my household. Was wondering if I should have gotten the D200 - the main reasons are:
1. the more "pro" feel than the D80 (better functions, better controls etc.)
2. the "overexposure" issue on the D80
3. Magnesium alloy body, more hardy, better sealed than the D80
3. the "must buy better and better equipment syndrome".
The main reasons for getting the D80 were:
1. price (almost as good a feature set for a lot less $$$)
2. size - the D80 is even smaller and lighter than the D70s; given the fact that I travel a lot, this was a big consideration.
No regrets now. But if I had the spare cash, I would have gotten the D200. Right now, I am thinking of keeping the D80 until the D200 update comes out in a couple of year time. I would probably get that and keep the D80 as a compact travelling SLR