so i'm not really aware of the guidelines of a man cave, but i have seen one before so i think i know what you're going towards.
do you sleep in this man cave? because a home theater, pool table and a bed seems kind of big for a small room. i couldn't fit those three in my room and i share mine with some one else.
also i'd imagine an aquarium is a bad idea because it would basically get buried under stuff and any fish in it wouldn't survive, also if danny isn't already attached to a fish he owns then it'd essentially just end up being another chore.