As long as you are planning to keep the camera a number of years go with the newer technology (better high ISO and video). The D90 is already 2 or 3 years old a design while the D7000 is merely a few months on the market.
I'm glad to read you have dropped the idea of an F5. Those cameras were so big and heavy but in their time did a great job. I can't imagine air travel with film nowadays. In the 90's I used to travel with soft coolers filled with film but now it is much easier with digital. Also getting film developed and scanned is expensive and time consuming now.