Well to answer a few guys, starting in 2009 they offered a 730 CA battery which I have that option, and I would be getting either 2 or 3 of those
I am planning on running a lot of power. Full audio system, air compressor for on board air, train horns, and an absolute ton of lights. All of the light will be pulling a total of about 210 amps just in lights.
My main reason for getting big dual alternators and triple batteries is so that despite the fact that I will probably never turn all of my accessories on all at the same time, I will know that I can and have it all be safe and work well with enough power.
I am unsure of the onboard air setup I want, I do know the train horns I want but I also dont know what the audio setup I want will pull.