Congratulations on a wonderful integrated. I also have the 509X and love it so much. Many great suggestions, fwiw I have Klipsch Cornwall IV's and they pair beautifully with the 509X. They do excellent close to a wall. I was in a larger space last year at 14 x 24 with them out at 18" and now am in a 14 x 14 room that requires they sit at about 10" out . They still sound excellent. They are a bit large though....
Please share what you ultimately buy and how they sound!
Please share what you ultimately buy and how they sound!