CDP with inputs for DAC

Looking to buy preowned cdp that can act as dac for my sonos system as well. Buying from here on audiogon. Price less than $1200-1500. Manufacturer must still be in business in case of failures. Bring all opinions please.
- Cambridge 840C
- Unison Research Unico CD
- Quad 99 CDP2
I use the 840c and a sonos sytem together. I am very happy with the sound.