I agree with Larryb. Most high end is not great for rock music. Resolving and revealing, airy and transparent, these are generally not the ultimate sonic goals of a rock-oriented system IMO. I went through this process, and ultimately decided that simpler is better.
When I had a Jolida 502B paired with Soliloquy 5.3 speakers and an Adire Rava sub, I found I was totally engaged when listening to rock/pop/country. With the switch to an Audio Aero Prima Hybrid, the bass got tighter and punchier, and the sound was equally as engaging. By the time we upgraded to a $2200 CD player, and a pair of $6500 speakers, the musicality of the system far surpassed that of the recordings, and we were beset on a quest similar to yours: to tweak the thing to death until we realized that the simplest (and less expensive) system worked best for us when it came to this genre of music.
On another note (so to speak), how do you like the Cremona's? I found them to be exactly as you described your system as a whole--sterile, and harsh in the highs. Are they more to your liking with the addition of the Pathos? I would think that you would find the music more to your liking with some tubes in the system--either in the form of a hybrid or tube amp.
For our rock-oriented system, we are reverting to something simple:
Audio Aero Prima Hybrid Amp
Simple CD player: Rega Planet or Naim CD5i
Soliloquy speakers (probably 6.3)
I did not care for the AU24 IC's, nor did my wife. Smoothed over highs, and frankly boring in our system. We much prefer the clarity and immediacy of the Z-Squared. Or the Verastarr.
Sorry if this sounds scattered. I'm just trying to say that when it comes to creating an engaging system for the type of music you like, I would suggest that less is more.
Happy New Year,
Howard