Do you mean having what you have modified or upgrading to something you might like more from a musical standpoint? I will tell you, as far as modifying goes, I would not let anyone touch anything unless the person doing the work has a set modification for the unit that has proven itself to be an improvement - such as Modwright's mods to the Oppo DVD players. Just haphazardly replacing parts with more expensive parts is nothing but a crapshoot, IMO. You need to know what you're going to end up with. If you mean upgrading to other components, you would have to list your system, the type of music you listen to, the volume you want to achieve and what your sonic priorities are, i.e., midrange naturalness, concert volume, huge, powerful bass. Whatever.
