TNHagies is right on target. I actually just moved over to digital with D-80. I love it!! You may pay a little more, but it is an increadibly versitile camera.

On the topic of lenses, I am having more luck with my 18-135 than I thought I would. I still take my 70-300 out with me, but I find that most of my best shot are in the early morning or right before dark, and the 70-300 is doesn't do well in low light. Longer lenses are a must for wildlife, but make sure you pick ones that are effective in the lighting situations you will most find yourself in.