I never stack my systems. Thats what a good entertainment stand/holder is for. If you lack the space for one of those with multiple compartments/shelves then you can just take that as a sign that you probably only need a few consoles hooked up at a time, whatever you are currently playing most. I can hold 10 different consoles in my entertainment center but as a rule try to never have more than 5 consoles hooked up at a time. Because realistically I won't be playing all my systems every single month.