heres my new setup
just got the tv and the ps3
(the empty spot normally has a N64, but brother has it in his dorm room atm

all the systems are hooked up through the a/v switch, so i just press a button to switch between systems
and i also have 5x old tvs on either side of mine for friends/brothers to hook up their 360s when they come over
(there is a pic of the whole thing somewhere in this topic, but that was before i got the ps3 and the new tv)