If you highly value what the Gamma Summits do well, and that is a substantial list, tread carefully replacing them. They are an excellent speaker and don't come up for sale very often. There is nothing wrong with trying to find something better, but the grass may not be greener. I would hold back selling them until you are certain you are making the right decision.
What to upgrade to?
I will be retiring at the end of the year or earlier depending on the Covid virus. Anyway I am looking for that last upgrade to my system. I will be looking at either upgrading my analog system or loudspeaker. I have about 10k in a complete turntable and my speakers retailed for 12k about 5 years. Both I could live with in retirement and be quite happy. But I have $15k - $20k to spend if I want to on either upgrading my turntable or speakers. What would you upgrade? Turntable or speakers?