It’s important to consider the size, weight, and drag of an underwater video system. What’s right or wrong depends on your type of diving and the results you are trying to get. If you are a recreational diver who travels a lot by air, you may want to sacrifice some other features in favor of a small compact system that’s easy to travel with. Cave and wreck divers likely want systems that are streamlined. Professional videographers shooting in open water with a couple of assistants may not care at all about size drag and bulkiness as long as they get top quality results. The right thing to do is to choose the best for your situation and expectations.