OK, another question for the gurus. I am planning on getting a flash for my D700. I used to have a SB600, and really liked it -- the build quality, power, size, etc are all fantastic. I am debating between the newer version of the SB600 (which is the SB700) and the Metz 50 AF-1

For those familiar with both models, what (if anything) would I be missing if I went with either one