Although the D70 has some very good reviews. I am just fuzzy about spending money on a camera body that is made out of plastic. I have a plastic bodied point and shoot already and it has stress cracks and with investing in a D SLR, I would prefer to place my money on a camera body that is made of magnesium. Thats just my personal preference. I think including the D70 they are all have an image sensor that is close in specs and the D1X is a bit more dated but it is still one of the top cameras, even at its age. Just availability is a bit difficult.
What other models did you have on mind?