If you don't have any 35mm equipment or lenses you have a lot of flexibility. Both systems have good and bad points. The D70 is quite versatile with flash sync which may help you.
If you are shooting interiors with a digicam you will have an immediate increase in image quality due to the much lower noise in the DSLR.
Nikon has a better selection of wide angle lenses for digital, however third party manufacturers are filling the gap.