Well in looking at the flash there are some things to consider.
The SB-800 has Nikon's advanced communication system, same as the SB-600, for those who don't know this simply means... they are thinking. You can put those flashes down and they will operate as a fill flash wherever they are.
But in the world of 800 vs. 600, we are in a realm of the Burger King Tendercrisp versus Spicey Tendercrisp ads we are seeing so much of on tv.
The SB-800 is a step above the 600 in the realm of power and recycling speeds. For the $120 your paying in differencer, your SB-600 is getting a shot of steroids and coming out as the SB-800. For what we spend on equipment as photographers, $120 is a small price for the added versatility of the Sb-800 over the SB-600.
But all the same, both good flashes for the D-70.
.... and for thr $120, I can have not a small but a MEDIUM COFFEE!!! [img]/ubbthreads/images/graemlins/cool.gif[/img]
Glorified Unique Photo Counterboy