this would work fine as long as you only need 2ch audio from the pc(i don't remember you saying anything about audio processing)..
Nice to see another S-Series around. I'll be looking forward to this project. I'm running my pc audio through my Pioneer 6000UB, however I got lucky and it has both a regular 3.5 female port on the back and I also bought the aux plug, but mine terminates into a 3.5 male plug. However, if you need some length this probably won't work for you and one of the 2 soundman posted would be better since you can utilize RCAs with those.
Project X10 Belazer
Progress: NEVER ENDING!!!
^ exactly. some decks have a built-in aux input that just needs to be enabled (in the same menu you change the time in), other units require a adapter..
if you don't need any other p-bus devices, the cd-rb10 is all you need, but there are tons of cheaper non-pioneer-brand options out there that will work just as good. i always prefer to use ones with rca connections because it is the easiest to adapt any other cable to..