Thank you guys again for your great input. I feel I'm really spoiled by the ease of using the Bluesound/Tidal combo to play any music I like, or don't like, from my mobile device. It has allowed me to explore the music genres that I never knew I liked this much. I have also used this opportunity to educate myself about various audio coding formats out there just to keep up with what some of you guys talk about. We have a brick and mortar hifi store nearby and I might stop by and see if they'd let me borrow one of their high quality DACs for a few days. This would at least help me decide where to focus for the best bang for the bucks upgrade path in my audio chain. Maybe after all, this piece is not the weakest link in the chain. My current set up is:
Bluesound Node 2 -> NAD C165BEE (MP input) -> McIntosh MC2200 -> ML Aerius I.
I also have a Vincent SP-331 amp being fed from the second preamp out port driving a pair of Definitive Technology BP20s in an adjacent room.