cdp variable vol with ht pass

This is a little more difficult than other posts. I am only in need of a cdp for my system, but currenly use a preamp for reasons of passing a processor into my amp, cary cinema 5. My question, if I was to go with a cdp with variable vol. is there a model I could pass my av pro into? I realize the reverse exists, cdp into pass through on processor, but I am a firm believer that passing a signal into a digital processing unit MUST degrade the sound some. Any help is appreciated.

JWH