Remote
King,
A good remote can take care of that for you. Check out the options from Logitech/Harmony and URC Home Theater Master. I got the URC-300 remote with R/F base station and it was working great. The other day, my wife was complaining because it was too dificult turn on the XM radio. With a few button presses I set up a macro to: Turn On Receiver, Change to the Tuner Input, Change to FM station for XM, Turn On XM receiver, and Change to her favorite XM station. The marcos for the video switcher would simply change the video source any time you change the audio source.
Also, the Iscan has a serial port to receive commands from more complex home automation system like Crestron.