Sure, the Pace-Car can be applied to significantly lower jitter.
For instance, if you want to drive the system from a Toslink output from a Mac, then you can run the long toslink from the laptop to the rack and then into a Pace-Car. The output from the Pace-Car can be short S/PDIF cable into the system you describe. The Pace-Car will eliminate the jitter from the computer and the effects of the long Toslink cable.
To make this happen, I will need your laptop here to tune the Pace-Car to it.
Another option is using a Squeezebox, Sonos or Duet with the Pace-Car with WiFi from a laptop driving the music. The WiFi device is on the rack and drives the Pace-Car. The Pace-Car again drives the system with a short S/PDIF cable. I dont need to tune the Pace-Car in this case, but I need the WiFi device to add a slave-clock input to it.
Either of these will sound exceptional and they with both be identical in sound quality.
Steve N.