Solid State for Rock and Tubes for Jazz, Yes or No

Tubes can rock HARD (as mine do), you simply need the right amp/speaker match.

Triode,

Yes, maybe with Avantgarde's I suspect. GOtta hear a pair sometime. I have heard some other very good high efficiency horn based rigs that I am sure can do the job, at least with the right "tweaks". I would expect speakers like those to be quite sensitive to pretty much any change and perhaps more of a challenge to get tuned in properly than others. But once you do, and it stays there, I would expect exceptional results, though perhaps different still from most of what I am used to that sounds good to me with that kind of music in particular.

"Tubes can rock HARD (as mine do), you simply need the right amp/speaker match."

Yup.

Tubes rock with Zu Definition speakers too. And Klipshorns that I had as well. I could probably use a few more watts for my Zu's but 6 watts was plenty for 104 db Klipschorns.
I'm sure you can make this work with just a tube amp, as long as you carefully match it to your speakers.

Ive heard zu with a flea powered set amp fall short with rock music. More power might have done it.

NO. My solid state system does jazz better than my tube gear.