I have the system selector that HarumaN posted also.  It works great.  You can also daisy chain them together to get more outputs.   In my bedroom, I have a 4 port selector, with the first port going to that pelican Game Selector.  That way, I hit "1" on the top selector, and whatever system I want on the Pelican, and I'm good to go.  I'm actually out of ports again lol, so I may need to get another Pelican.