What are you using for a source? If the system is fine but you're not getting the enjoyment you want, maybe you need a higher resolution source. YMMV, but for me I got the uptick I needed by getting a turntable. This may not be your case, but in mine, the analog source had so much more musical information it became apparent that no downstream component could have fixed what I needed.
Maybe you're committed to digital but need to consider moving to a computer-based system that buffers the data stream, upconverts to 24/96 or 24/192 and outputs to an asynchronous USB DAC.
Maybe you're committed to digital but need to consider moving to a computer-based system that buffers the data stream, upconverts to 24/96 or 24/192 and outputs to an asynchronous USB DAC.