Opinions on total-package electronics brands?

I want to go all with one brand of equipment to ensure best compatibility and resource sharing between all the sensors, components, and systems. The boat is a 1981 C&C 32'. I intend to use it for live-aboard, coastal cruising, and for longer trips down the eastern continental shelf (to FL, Bahamas, etc). I intend to mount a second controlling head down at the navigation station. When living-aboard and sleeping at night this will give me access to GPS position (for anchor drift) as well as information from the Sirius weather receiver and radar for upcoming weather conditions. I know this is not a middle-of-the-North-Atlantic type of boat but I still intend to set it up for long cruises down the coast off of SC, GA, FL, and on to PR, Bahamas, etc and would prefer in-cabin operation.