Here is my story... I am a full time photographer (land). I've been to HI and a few islands several times now and have been frustraited not being able to really take any underwater pictures. We have decided to go back this year and I really want to spend a few days messing around with this. I don't see this as something I will use more then once or twice a year. So far my only experence (with a dslr camera underwater) has been with the underwater bag things & a swimming pool & a light up top, this gets me some neat shots that sell well at swim meets.
Anyway I would not mind setting aside a budget of around $1500 to try this endevor. I shoot nikon so I have lots of Nikon lenes & dslr bodys (d1x/h & d2x/h). Ideally I would not like to have to buy any new lens/body combo. I would perfer to put my money towards lights and a housing unit. What should I be looking for? Can I come up with anything for this budget (I don't mind buying used)?