I’m pretty sure Cardas is what you want. I’m guessing Clear Reflection would be your first best bet.
Your new speakers are going to be extracting a lot of treble and be more flat. The result will be you are hearing deficiencies in your older electronics. If upgrading to contemporary electronics, I would use interconnects and cables from Cardas, they are much warmer and forgiving in the less expensive levels and get more neutral at the higher levels… by design.