If you have not already subscribed to Jim's newsletter, he has just moved to a new site. Here's a link:
https://www.getbettersound.com/quarternotes
This month, you can read about how Jim was able to scale back his reference system by 75% while maintaining (or improving) sound quality.
Make sure to subscribe so that you'll be notified when there's update (infrequent). Cheers.