I like your list.
I recently upgraded my amp, and the sound of the music changed. More bass, crisper bass, more stereo separation, more detail, slightly different sound, possibly a bit 'brighter' or possibly just more detail... who knows?
Anyways, it has been less than a week and honestly, I am now so used to the 'new' sound, it is becoming hard to remember the 'old' sound. I wrote down my impressions a week ago, or else all I could have said is 'its better'.
@rvpiano "3. If it sounds really good, leave it alone." So true.

