Do I have a balanced system?

Put them all on one scale, the only thing that's not balance here is your head, I think. The mind is a terrible thing to get messed up here, that's the reason why the so called "Upgrade Bug" it's all in our heads. Just sit back and enjoyed the music my friend. Of course there're always room for improvements. take this phrase( MINE IS THE BEST, BECAUSE YOU CAN'T HAVE IT, AND I'M THE ONLY ONE LISTENING TO IT). We all have different taste for music, never one system is identical to another, so the only advise you should listen to is your own. After all those upgrades, is this your most satisfied moment yet? If it is, then let just put an end to it.

if resolution, dynamics, freq response etc. are within balance, then the net result is MUSICALITY.

If the sound satisfies your expectations then you've arrived; if not, then you're not there yet. Simple.

I must say, that I am very happy with my current set up. However, I have been happy with past setups only to find a whole new world of musicality was one upgrade away. Nonetheless, I think I'm at a decent stopping point.

I hate balanced systems. For my tastes it is to balanced. Seem like you should sneak in one outrageous piece of gear in there.