I am not familiar with the digital output of the Sony, but I suspect it may be either RCA or AES/EBU, which are PCM outputs. The DCC2 will convert that source, but, I think, the real strength of the unit is realized when you use the word clock synchronization afforded by the optical dsd inputs. They way I understand it, (someone correct me please if I am in error) is that the Dcc2 supplies the word clock to the transport, which then returns the clock back to the DCC2. I assume the Dcc2 can then compare the sent out vs. received clock signal and correct for errors, essentially reducung jitter to nothing.
Using the Dcc2 as a PCM converter will work, but I suspect it may just be an very good converter.
The pre-amp section of the DCC2 is excellent, there is better out there, but it handily beat my old ARC Ref2Mk2, and freeing up those dollars (as well as an interconnect) made the ticket easier to swallow.
I say get the Dcc2, and when you can, the CDSD will always be out there... As far as the ability to drive your amps, check the specs on emmlabs.com and compare the maximum output voltage and impedence with what your amps need.