Triode or Ultra-linear? Why?

@lloydc A good friend had an inside relationship with the folks at Mesa, and used a Baron for a while.  Mesa got out of the high-end audio business due to a lot of "advice" coming in regarding how to build an amplifier, especially in relation to a severe lack of $$$ coming the other way.  This isn't a hobby to them, and this market just didn't make business sense

You’re right WOLF. Some of the best guitar amp implementations of the major players.

My friend looks like the typical go through audio components like socks audiophile. But when he got the Baron, he told me his wife said, "Throw the box away." Yeah, right. The next time I visited he had an Antique Sound Labs 1006 that ran 2 X 845 tubes. Personally, I thought that amp sounded better in his system than any he’s had before or since, but the Mesa impressed me a lot as making too much sense from the standpoint of flexibility, build quality / reliability, really good sound, and it was sensibly priced