I saw your post in the Nikon forum so I thought I would try to answer your question since no one else has yet.For a budget of $1500, you will not get very far going the SLR route if buying new. You might find something decent if looking at used stuff.If you are on a tight budget, the SL-1 would likely be your best option. But, you will want to save some money for a tray, arms, and some strobes. You will also need money for a wide-angle lens and a macro lens. Plus the associated ports. So right away, your budget will be completely blown. You are looking at a minimum of $5k for SLR camera, macro lens, wide-angle lens, housing, ports, and strobes. I am guessing you are planning to save money by confining yourself to a kit lens (i..e, 18-55mm). If that is your plan, you are better off getting a compact camera, for example the the G16 or G7x. Image quality of these newer compacts are getting better all the time, and most people won't even notice the slight difference in image quality. IMHO opinion, image quality difference between an SLR kit lens and a large sensor compact is so small to the point of being insignificant. Plus the G16 and G7x have much better macro capabilities out of the box compared to a standard SLR kit lens, and ability to o focus close is very important for underwater. So if you get a compact camera, at least then you might have a bit of money left over to buy strobes. No point in getting an SLR housing if you don't have strobes.