I've used the Nexus acrylic 170mm dome with the Nikkor 10.5mm: it's pretty good, but big. I wouldn't dream of using it without the aluminium shade because of (a) scratchy underwater things that seem attracted to acrylic domes, and (B) flare.
I've just borrowed the amazingly tiny 160 glass dome, but since I've only photographed my toes in the bath, I can't say much useful at the moment.
I understand that the Nikkor 16mm works with the same ports, giving a distorted 120 degree image, and that several other lenses can work. I have a cunning plan, vide Blackadder's Baldrick, to find out if the Tokina 17mm rectilinear lens will work with the 160mm glass dome. Baldrick's plans never worked, so perhaps this is wishful thinking, too.
The 170mm dome is very flexible, and I've used it with a 40mm extension to house both the 12-24mm and 18-70mm Nikkors (using +3 and +4D close-up lenses, respectively). Compared to my Coolpix 5000 with supplemental lenses and a glass dome both of these lenses are good, and the controversy over the 12-24mm (soft edges at 12mm) seems a bit misplaced. I keep many more images than I ever did with an optically superior Nikonos system!

Tim
The wide-angles won't, of course, work behind a flat port.