Checked out the D2 today. If you HAVE to have a physical keyboard, then it is probably a really good phone. I can say that the keyboard is notably better than the D1. However, I still have problems with it as I don't think the keys are "dome-y" (yeah, I made that up) enough. You can feel them better, but I would prefer a more noticeable peak so I can feel them better.
That said, I am much better/faster using Swype. I'm even better/faster using SlideIt (from the market). They are, IMO, far more productive. And I used to be a keyboard diehard. Don't get me wrong, I'm not going to be turning in my laptop keyboard, but on a smartphone, IMO, these Android keyboards are much better.
If the DX is too big AND you don't need a physical keyboard, then I'd suggest the Incredible as I don't see why you'd want the extra bulk of the D2 relative to an equivalent screen without the keyboard.
I have to admit that I'm VERY happy that I went ahead and got the DX rather than wait on the D2. I would have been disappointed and would have had to live with my BB Storm 1 for another 3 weeks (from my NE2 date).
Scott