Is the 7 Years experience solely of the Kef and Rega, or have you ventured out to take on board what other arrangements of Audio Equipment can produce as an End Sound??
Mentioning $10K on the Gon is going to attract various attention and intentions for such a budget, which can expose an individual to being steered in directions that may be not the most advantageous to your new direction being planned.
Do not buy on forum recommendations, take info offered as a means to a further investigations and gather useful info.
Create a Shortlist and invest some of the $10K budget in creating a opportunity to listen to End Sound being produced by shortlist devices and others that may present themselves.
Act in Haste - Repent at Leisure
Caveat Emptor is ones best friend when going on this journey type.
Do not overlook the Kit Market, which is the 'Road Less Travelled', where an option is to have a device purchased which can be commission built on ones behalf.
Most of my equipment comes from this method of purchase and it is not uncommon if approached with a reasonable understanding to acquire audio devices that will requires 4-5x the spend to achieve an End Sound from the commercial world that can start to compete in this area.
A Neurochrome Power Amplifier, I have a module 65 in my home at the current time along with a few Speakers that are Commission Built from a Kit Design.
https://forum.audiogon.com/discussions/diy-speaker-kits-a-good-idea
Using the suggested purchase methodology and having an audio device built, at a price of $2.5K - $5K can easily get a system in place that can create need for a Budget to extend to near $15K - $20K to better it, if off the shelf commercial items are being selected that can compete with the End Sound being produced, maybe even at used item prices.