ARC CD 3 mk II upgrade with DAC 8

My current gear is all ARC which includes a REF 3, CD 3 MK II and REF 75. In the continuation of ongoing improvements, I consider my digital source as the next component for upgrade. I have been considering the CD 6 or a used CD 7. Recently a friend purchased a CD 9 and has offered me his DAC 8 at a very reasonable price. Using my existing CD 3 as a transport in conjunction with the DAC 8 is an option. Any recommendations or thoughts on this would be appreciated. thanks