I have a 2003 Z71 Tahoe that I'm starting to fix up. As far as adding components to the truck that need power, I forsee putting in an in-dash navigation system, but not a big audio audio system (amps, speakers, etc.). I also will probably have at least 4 or so 6" off-road lights. Lastly, I have a Warn PowerPlant HD that I will be installing once I decide on a bumper. The winch will most likely see intermitent use (a little bit of offroading, use in the mountains occasionally). Can some of you give me some advice on batteries for all these components? Is one heavy duty enough or should I go with a dual setup? If any of you recomment dual, can you point me to some kits and batteries as I don't know anything about duals. And yes I read the dual battery thread below, but I just wanted to get some opinions. Thank you.