Grannyring, sure I have seen wadia with input cards, and Quad Audio type CD players able to play the disk and have an external music source flow thru right to the internal dac, they even come with several digital inputs I think too.. This is good because you can have a good transport right there, as well as all your high quality cables are shared to feed the analog audio signal to your system after conversion...This eliminates having to have several cables too. So yes even the super hi-end pieces can be modified to be not completly obsolete. But I just choose to for now use a good DAC cause it will never go out of style and is a safer investment and will always just be a good decoder box basically for whatever Redbook source can be thrown at it, and just Run any type Transport I want vs. expensive CDP,Plus Dac's in general now have extra input so I can leave a transport and when the Audio MEdia systems settle down, can hook anything else simaltaneous to the same dac and not lose out on anything.. But I will never invest in a a very expensive straight CD player again, cause yeah unless they all start offering or can even fit the extra components in it for external devices to share the dac its a risk, and will start loosing value more and more.