JDeV - I don't want to be mean, but it seems like your real question is ... "Should I get a D7000?" - isn't that what you are trying to get at?
To be honest the D7000 and D700 have almost the same image quality.
The next real question is video - yes or no important to you? I didn't see any video on your site, so I'm guessing no. (nice images by the way!)
So given basically the same IQ, and if video isn't something you care about or you use a separate system... it really does come down to the extra built in features that are in a D700 (D300 same).
I have not used the D200 for a very long time but if I remember correctly, it has a-lot more than the D80 your son has. The D300/700 added more to that set. The D80 feature set is almost the same as the D7000. I use a D300 and when I picked up a D7000, all the features that I use regularly, it does not have. (please don't ask what the are - it's second nature to me and every time I asked "where the F is the X", the sales guy said it was only on the D300 on up.) It was so frustrating for me to be missing those, I will wait for the D400 or D800.
If the feature set doesn't matter at all...Than it is price.
All of this comes down to your personal preference and only you can know if you go to a store and try one out. I find the D7000 almost two small for me - but that is just me. What it is too you - only you know. 90% of your questions would be answered by trying one out.
One thing is for sure, coming from your D200/D80, it will blow your mind what either camera can do.
Tao, thanks for the nice comment. Video was not important in the past, but other professionals I talk to say that they are getting more and more requests for a simple video, so I'm thinking of getting into that. I'm also a creature of habit, so having a different feature set would probably drive me crazy...I should really check out that issue...I take my son's D80 as a back-up, but I've never had to use it, so I was unaware of any major differences...not being able to use something that I normally use would drive me crazy, especially on a job!
If I could get my head around the feature set differences, and the weight/feel is close, and the ISO is better, and the price is better(recent medical bills make this one really important), I'm beginning to lean towards the D7000. Now if a big paying job comes walking in the door, I could be waiting along with you for the new cameras to arrive.