Hi Scott,
Another option for you is if your starting from scratch in a DLSR setup (ie dont have any lenses of one brand) I would be looking straight at the Canon 5D mark II. (
Canon 5D Mark II)
Yes I know this is a Nikon section of the forum but the only thing that comes close to the Canon 5D mk II is the Nikon D3x which is alot more money. The Canon is only $200 more than the D700!
If any Nikon user can think of the better camera than the Canon 5D mkII in the Nikon range for the same money please let us know.
You will be entering straight into full frame sensors and non digital lenses (still can use DX lens but they are cropped down to about 10mb).
Ikelite make a housing for the Canon and its about the same price as the rest of the Dslr range ($1500-1600).
As for ports there isnt a one port that will do all the work for you. Normally you just have a flat port for your macro (flat port magnifies your shot) and dome for wide angle (dome needed so that there isnt any vignetting).
Also if your going for Ikelite, they have a a modular port system now which you can buy.
MODULAR PORT SYSTEM
For non digital lenses i would be looking at the Canon 100m macro and maybe the 16mm for wide angle.
Something to think about if your looking at spending the money now on a setup.
Regards Mark