PS Audio...that’s it.
By now you should find some nice deals on used P5/P10 units.
Don’t hesitate, when it comes to clean power PS Audio is the way to go. After I’ve tried the P5 "I couldn’t live" anymore without a regenerator.
Not to mention their customer service, it's one of the most effective and proactive I've encountered in this business. In my book that counts. A lot.