If you have no complaints - don't change it. Really, you should never change an audio component if you don't have a clear idea of what you are trying to accomplish. Otherwise you are just rolling the dice, and will likely cause a problem somewhere rather than fixing a nonexistant one.
Instead - take a good assessment of your complete system, identify any strengths and weaknesses you may have. Focusing on improving the weaknesses is a better approach
Instead - take a good assessment of your complete system, identify any strengths and weaknesses you may have. Focusing on improving the weaknesses is a better approach