I'm building a game room with four TVs. The number of sources (game consoles, computers, etc.) outnumbers the TVs, obviously, but I'd like to be able to assign different sources to different TVs. After doing a bit of research, I think my best option is to go with an HDMI Matrix Switcher. I want to make sure I understand how they work. Will a matrix switcher let me assign any source to any TV on the fly? Also, can I use this Harmony remote to create preset assignments?