The first digital camera I bought was the D70s. I bought it in 2005 and I would still be using it if I hadn't given it to my daughter to use. She is still using it. Like Frank, I upgraded to the D300, but the D70s is so much lighter, its battery seems to last forever and it is much less complicated to use than the D300. The D300, however, is better for underwater photography, which is why I bought it in the first place. It has many more focus points than the D70s and is a much more sophisticated camera in general.
Ellen