Hey guy,
I used Cinemar on a simple custom system that I mocked up a year or so ago, and found it to be decent. I say decent, because it wasn’t great by any means. I have yet to find any PC-based programs that work 100% of the time, and exactly how they are created to function.
If I were in your situation, I would stay with a core system that already has the bugs worked out of it. There are a many different options and systems available to you, depending on the budget (I’m guessing isn’t too much of a concern), performance vs. needs, control interface options, system bulk (in a yacht, I would think that a smaller, more compressed system would be a huge benefit over a larger sore system), and a multitude of other aspects.
I utilize NetStreams for my core AV control system, and it’s solid. I recommend that you look at the DigiLinX system. They are clean, easy to program, easy to use, highly capable, and one of the best things is that they answer their phones when you call them. When I talk about the bulk of the system, each of their 2-channel amplifiers will fit inside a standard 2-gang electrician’s remodel box. They’re clean digital amps, and they are very efficient.
Again, take a look, and see what you think.