@no_regrets I also have a full loom of AZ cables, and the last one I added was their MC2 digital interconnect, and if you like the AZ house sound this one is a no brainer — read the reviews as they’re pretty spot on. Here’s a nice one you should be able to get for $300 if it’s still available as it’s been on the market for a while.
https://www.usaudiomart.com/details/649210067-acoustic-zen-mc2-digital-cable/
And while I agree your Rotel will work as a transport, transports matter and make a big difference so at the level of your system I’d look to upgrade that if CDs are important. You could consider adding a DDC like the Denafrips Hermes that would likely up the Rotel’s performance significantly, or you could go to something like a Jay’s Audio CDT2 Mk3. If CDs are important and you’re not gonna go to streaming I’d definitely do one or the other because the Rotel will likely be a bottleneck. Hope this helps, or best of luck.