so the thinking was more cranking power for starting, brighter headlights, and in general just a more modern system. i though this would also help with an issue of the engine not wanting to start after iv'e used it in warmer temps. if i don't open the hood and let it cool for 20-30 minutes after i've used it for a bit when outside temps are in the 60s or higher, it will just crank until the battery dies without catching. engine temp remains 190 or so whenever i use it, just the issue of shutting off and restarting without a "cooling off" period.
we've since changed our minds and are leaving it be, for now. thanks for the responses. this will be good to have for future reference.