@artg
I believe the M3 will sound better balanced but it highly depends on associated equipment and cables. Will it sound so much better that you will need a hydraulic jack to lift your jaw up off the floor? No
If you have good RCA cables you should be fine.
As to Roon…to simplify your streaming setup I highly recommend Roon Nucleus One.
Simple, reliable and sounds good. Also Ethernet cables are very important for M3 and Roon core.
M3 is a very nice DAC. I don’t own it anymore but still think highly of it.

