The wall of sound.
Once you've experienced it, you will find anything less unsatisfying. I have had the pleasure with my 5 watt per channel SET tube amp driving a pair of M22 like tweaked Michaura M55s and even more so driving a pair of Michaura M66s helped by a Velodyne 12" sub and sourced by a tube output Ah! Njoe Tjoeb. The 'wall' is a uniquely satisfying musical experience where the sound stage extends seemlessly from the centerpoint between the speakers, to far outside the vertical centerline of the drivers, to a virtual space behind the speakers and above them as well.
It is an awesome, pinacle experience of musical reproduction.
Other than that, I think you have it pretty right there Jay.
Enjoy the Music. Trust your ears. Laugh at Folks Who Claim to Know it All.