Hi. I'm a new owner of the D-80, but Im not qualified to tell you how great it is because, like you, I'm a novice in the photography hobby. Also, like you, I wanted to change that. If you're like me, many of the posts won't be very helpful. I don't know enough to debate the ISO noise reduction issues. I haven't handled enough cameras to know which camera feels right. My guess is the first camera I handle significantly will become one that will "train" my hands to work with it.
I believe, like many have said, you can't go wrong with either camera as a novice. If we apply ourselves we will become better photographers as our skills develop - but our path to understanding our camera's, their settings and how to optimize what they offer is long, and will take time to travel.
I'd say make your choice (I'm sure you already have). Develop your skills, practice with your new camera and be patient - there's so much to learn! Together, in 3 or 5 years the DSLR world will be completely different and, if we are diligent in our studies and practice, we'll be much, much better able to make a decision on our future DSLR purchases.
Good luck!