Barrelchief, just for clarification, are you saying that the modded zp80 WITH an outboard dac still doesn't match your reference cdp? Can you elaborate by identifying your reference cdp (and cost) and the dac(s) used with the modded zp80? I think this would help everyone understand your evaluation to date. I too am trying to get to the point, hopefully at a reasonable cost, of getting cdp-type performance from my sonos setup. However, I think it is important for all of us to establish a cost/performance reference. If I'm looking simply to equal the performance ofr my old Adcom GCD700, I shouldn't have too far to go, nor (hopefully) should I have to spend $2-3000 in total to match $700 performance. On the other hand, if someone is trying to match the performance of a $5k-10k reference quality CDP, well, that's another story. Can the Sonos system ever get there, and at what cost? Look forward to your current system comparisons. Regards..Jeff