Just to add my two cents --
In addition to a 7.1 561/dsp5000 home theater, I have two dsp5500's set up as a stereo pair around the fireplace in my den. They have their comms linked to a 504 tuner and a medidian CD player (508?). the tuner and CD player feed a Tact 2.0 RCS (CD via digital and tuner via analog). I also have a Thorens tunrtable and a Nack Dragon feeding analog ports on the Tact unit. The Tact turns all the analog input into pcm digital output. The Tact digital PCM output then goes to the dsp5500 pair as if it were native out from the CD unit.

The RCS unit makes an incredible difference in the room, regardless of source. You can tell it to output 24/96 from the analog sources, and, if it senses 24/96 digital input, it will also output 24/96 from those sources. I plan to pugrade my 5500's to 24/96 this year, so I can take advantage of that.