Xmore. I think you have a nicely balanced system. If you are not happy with the sound, there are a couple of possibilities. You could try different cables or you might want to consider a different sound altogether. I think to do that, is not necessarily an upgrade. You could try tubes in you cd player or maybe an amp that would give a different sound, like a YBA Integre or Electrocompiniet. The problem here might be that your speakers need a lot of power. What kind of music do you listen to and how large is your listening room?
I think you might find that the upgrade of one piece will just be the beginning of a long search, and if as you say, you don't have time, you might find yourself more frustrated.
I think you might find that the upgrade of one piece will just be the beginning of a long search, and if as you say, you don't have time, you might find yourself more frustrated.