The D7000 is a very nice DSLR, but it's not a D700, and I suspect it will be significantly less than the D800 or whatever it will be called.
Are you taking lots of action photos, as that's when the extra points of the focus system come in handy, especially when the movement is erratic, but to be honest, for sports, I never go beyond 21 focus points even though I have 51, as it becomes counter-productive. I do use all 51 for birding. Many I know only use 9 focus points when shooting sports, and the D90 has 11.
I like new technology too, (nothing wrong with reading manuals as it can really help you get the most out of your camera) but NAS is expensive, and I generally prefer to put my cash into glass.
There is a lot more in making highly competent detailed choices for a DSLR than most people think and few actually actually look at how the camera's features will work for them, as opposed at merely concentrating on the feature set in more of less of a vacuum. Getting the D7000 will delay your D800 further.
"BTW, I know this doesn't belong here but what do you think I can get for a 1.5 year old d90 and a Sigma 75-300 5-5.6?"
A D90 with the original box, all parts, all paperwork sold this summer for $500 via our forums. Check out the "I want to sell" forum. As to the lens, at least it's an APO, so it's worth something, but it's not a great lens and it's slow. I personally don't think that lens will make your D90 sale any easier.