I just got my D7000 and would say I would vote for FX as the format to get if you can.
Don't take that as disappointment with the D7000- It is amazing camera I am so far happy with (No--Haven't checked video yet and haven't found the sharpness setting to really see still image quality).
But on the lense side you really don't have the optimal lenses for portraiture.
I have now 105/2.5 and will really enjoy this focal length on DX (though I may keep it on my film camera more), but I do find 50mm is too short for portraiture (have to move closer to the subject than I would have liked) and >=85mm too long. I would say this is just my personal opinion if a half-century of lense refinement hadn't converged at a similar angle of view for portraiture.
I will keep using my Tokina 28-70mm between 60 and 67mm for portraits, trading off in image Q, Bokeh, and weight. For those who like zooms and are okay with 2.8 that's fine. For those of us who like primes for their compact (less intimidating) size and wider aperture, that's a problem.
I also find the 35mm a very well made lense with a plastic smoothly touching plastic feel I've never experienced before. If all inexpensive DX primes are going to be like this, FX is not going anywhere.
I don't see myself needing a better camera than the D7000 EVER and hope to see a few more "plastic" DX primes, but I don't see how FX could possibly go away.