You have a nice system. I've never heard that combination, but it looks solid to me. If you like the sound your getting, but want an improvement in Sound Quality, I agree that room treatment and very tight corrections in speaker placement would be time and money well spent.
It seems that you only have CD as a source. Are you good with that? If you are interested id discovering new/different music, I would recommend you invest in some type of streamer and a high-res streaming service. I discover new/different music almost daily via streaming. My favorite streaming service, for content and a great user interface, is Spotify. However, it is not yet high-def. The SQ is not bad, but I'm guessing Qobuz is significantly better. I currently have a one year trial of Tidal, but I won't be renewing it.
If you are all digital (CD), a streamer, connected to your DAC, would provide you a nearly limitless catalog of music and sound about the same as CDs played via your transport and DAC.
