That RCA switch only has 2 inputs; you would need 4.
So, both Ed27 and Audiolab: what I would do in your respective shoes is use a SW44, and use my example #3 for setup.
The DPP Twin with seperators is good if you cannot run 2 cables to the receiver. The big downside is you can only run 2 receivers off the twin, unless you also get a DPP SW44.......... in other words a fair amount of bother.
The word on the street is that the 9220 package will come with the SW44, so if that's the case, it makes life easy.
"There are 10 types of people in this world; those who understand binary and those who don't."