I have a D200 with a DX sized sensor. However, I will only buy full frame leses for this camera because I suspect they will eventually go to a larger sensor. I am trying to purchase only high grade glass and with the cost of these it seems to make sense. I would hate be caught with a bag full of DX lenses that I could not use on the latest camera.. of course there is no guarantee that I will still not get caught in that situation with what I am doing.
I also want to shoot some film so this route made more sense for me.