For an interconnect solution, I recommend Cardas cables. Their lower end interconnects are specifically designed to be a bit warmer to help make up for brightness typically associated with more modest gear.
Longer termed I would look to upgrade your integrated amp… to a higher quality / warmer… tubed would be good. You might audition an Audio Research and Pass integrated. The ARC is very warm (yet still detailed). The Pass is slightly warm and very detailed and musical. Also, Luxman… but I find these a bit analytical.
You have made significant investments in your system. It is probably worth a trip to a big city to audition these components. Call ahead and make an appointment so they can have the equipment ready for you to hear.