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I'd say D7000....... I had a D300s... and it was paired at the time with my D700 as a backup body. Video wasn't that great on it... the 7000 does a better job in that department, although my 800 blows both of them out of the water frankly.
Unless you really need the higher buffer and FPS ... the 7000 is newer technology than the 300s, IMO the images produced by the 7K are better, and if you put a vertical grip on the 7k, it ads some nice bulk, and the ability to shoot portrait orientation with a shutter button in place - which is handy for longer lenses. At the moment, this is the camera body I use all the time with my 70-200 and 200-400... so it gets a lot of call for wildlife shooting. I am actually charging up the batteries as I type for a field trip tomorrow. I've got a bit of everything in the bag - D800, D7000, F100, and I am thinking of bringing out the Speed Graphic tomorrow.