I have owned Audioquest and found them to be more to the lean side of neutral. They could be why your system needs to be tamed. Have you tried your old IC's since your speaker change, They may sound good compared to the new IC's.
I would look for IC's that are some what on the dark side of neutral. MIT may work well for your system but can expensive unless you get some used or try monster. Also remember new IC's do need time to breakin around 200 hours and will sound very different over time.
I would look for IC's that are some what on the dark side of neutral. MIT may work well for your system but can expensive unless you get some used or try monster. Also remember new IC's do need time to breakin around 200 hours and will sound very different over time.