I tend to agree with nanug about these two. The DRSD is the king of dive watches, and because of it's popularity the prices have risen proportionately. The 1680 sub is a wonderful watch, but certainly not as big and "attention getter" as the SD. If you are looking at being a little more "under the radar" you might want to have a look at the White SD as well as the White dial 1680. To be perfectly honest, if it were me, rather than buy the ones you listed, I would search for and old MBW 1680 or 1665. They both take gen parts, and with a little work and modding, both of them can be made very gen like. Of course with these gen construction MBW's, you can take the nodding as far as you and your budget want to go. Here are mine, based on MBW's