Zen dome, 17-35, 16-35 preference

I just picked up a Zen 200 mm dome for my Nauticam housing. Any suggestions which lends to get? Is the 16-35 much better? I know a slightly larger dome would be preferable, however, any advice would be appreciated.

Which camera body?

D800

Sigma 15 or Nikon 16FE will shoot perfectly. The 16-35 + about a 70mm ext. will work, but you'll have soft corners. It may be fine for blue water use.

Jack