>I was on the verge of opting for the D7000 but >changed my mind in the last moment when I realized that ISO in >my style of shooting rarely exceeds 800 so that leaves the >D7000 way behind in my opinion.
At best, this statement shows a lack of understanding. At worst, it's an unfortunate misrepresentation by people who ought to know better.
The D7000, D800, and D4 are the most modern, most sophisticated, and frankly best cameras Nikon currently produce. While the build quality of the D300 is somewhat better than that of the D7000, The D7000 is a superior machine technically in nearly every respect.
The D300 is a fine camera, and I certainly hope you get the most out of yours, but don't be deluded that the D7000 is some inferior consumer level camera. If I don't have a LOT of shooting to do handheld or don't need to push beyond ISO 1600, I'll reach for my D7000 before I reach for my D3s.