I agree with Jack, I currently own the DX-1G and am very happy with it but if I did not own this camera, I would get the DX-2G. I usually have no problem with shutter lag except in cases where the camer has a difficult time focusing either because of low light conditions or when I shoot small critters. For a point and shoot camera, the DX-1G and 2G cameras have very short lag times (IMHO). I would also agree with getting the YS-110a strobe. It allows for more light with a wider angle and that means more of your subject can be illuminated. I currently own two strobes and am very happy. I would also agree that you will need the wide angle lens and perhaps the close-up lens as time goes along. As Jack mentions, it might be cheaper to get them in a package up front if you have the resources. The DX-1G and 2G cameras are also very compact and easy to handle underwater. I attach a coiled cable to the camera and my BCD that leaves both hands free to handle the camera and yet ensure that it is secured to me.
Regarding a comparison between the Nikonos and a digital camera, IMHO digital wins hands down. With film you are limited to 36 shots and you never know how good they are until you process the film. With digital I take the pic, see the results right away, and if I don't like what I see I take another pic. In some instances I've taken 15 or 20 pics of the same subject at various settings just to make sure I got a good shot. If you click on the "photos" link in the left hand pane under my name you can see some pics I've taken with the camera.
Regards,
Bill