>I feel like I'm more than >just a casual amateur shooter, but I don't feel I need FX to >take good photographs.
Well said, and nor should you feel that way. The FX prognosticators, the DX-is-dead mourners, and many other polarized groups, I think must take into account the fact that Nikon (and Canon, and Sony) have put literally billions into R&D for APS-C cameras over the past 15 years. All three companies, now joined again by Fujifilm, have over the past three years in particular produced astonishingly good APS-C/DX camera bodies. The successor to the D7000 will likely be just as remarkable. There's absolutely no reason to belive otherwise.
The wait for a professional DX body to succeed the D300/300s will not be much longer either. It should have been out last year, along with a D7000 successor, but the devastating effects of the March 2011 disasters in Japan and the subsequent massive flooding disaster in Thailand not that long after, set important parts of Nikon's product roadmap on it ear.
Thousands and thousands of photographers all over the world have for many years have been making award winning, contest winning and highly lucrative photographs with DX bodies. Nothing has changed.