@m-db Unsurprisingly (for Agon forum), not a single post with feedback on how to address the incoming ISP aspects.
You will achieve significant downstream upsides by moving away from your cable provider's modem/router and xFi pod. Replace these with self-procured modem > mesh router > mesh satellite. This essentially mimics / mirrors your current Comcast/Xfinity setup...but will return much better sound quality.
The above investment still leaves a significant percentage of your 10K budget for a network player and DAC. You will, of course, recoup your investment (over time) as you will not be paying a monthly fee for the Comcast/Xfinity equipment.
Feel free to PM me for specifics.
I have Comcast/Xfinity coaxial cable to their modem/router in an Apple equipped office approximately twenty feet from a remote xFi Pod with 2 ethernet outputs next to my rack. If this source is adequate what would you suggest next with a $10K budget?