So, after reading a lot here I thought I was going to get the toktina 10-17 lense for WA photo. After reading
http://www.uwphotographyguide.com/underwat...tography-lenses
I am starting to think it may not be best for me. Much of my WA will be here in North Carolina taking wreck photos where the fisheye look is not desirable. Would I be better off getting a rectiliner lens - if so, which one? I am shooting a d7000 with probably a nauticam housing.

I have both the Nikon DX 10-24mm rectilinear and the Tokina HX 10-17mm Fish Eye.
One can rectify ( straighten, 'correct') the FE image with one click in Lightroom 3.5 (or Photoshop) .
The images shown ( top left, bottom) were taken with a D7000 on a tripod from the same location, with 10-24 and 10-17 FE lenses at 10mm.
The 'corrected' 10mm FE image (top right) is wider than that of the rectilinear lens and, to my eye, just as straight.
So I'd definitely choose the FE if it were my only UW wideangle.
Topside shooting is a different matter ;-)
HTH ... Marc