@audioman58 I appreciate the tip, and based on my initial research, yeah, for $2K I can make a big step up in DAC quality. I do like the user interface on the Eversolo, so keeping it as my streamer makes good sense when I do upgrade my DAC in the future. For now, the Eversolo DAC is also a noticeable improvement over over the DAC in the C-47, confirming what @allanblissett and @bassbuyer have recommended.
@bilyeauxbrew, thanks, I've heard about such upgrades. I think I'll keep these as they are and plan on upgraded speakers in the future (and put these back with my Marantz 19).
@bassbuyer, thank you for the encouragement! I have my current equipment set up now. Since my speakers are what they are for now, I'll stick with the A6 and concentrate on the space. I am happy to report that my low ceiling doesn't seem to be as big of a challenge as I expected. With decent placement and some basic foam acoustic tiles on walls, I currently have the best audio quality I've ever had in my home. My wife and son are impressed. To share one tangible example, my wife loves Idina Menzel. I think she's great too, but I've typically experienced fatigue from the brightness of her soprano voice. But my system imparts just enough warmth to allow a full appreciation of her talent - credit McIntosh.
Next step is the addition of my REL subwoofers that should arrive tomorrow.