Triode or Ultra-linear? Why?

For R&R, UL  seems to be the preferred mode, since you want a little extra umph for the drum/bass. Typically any instrumental-R&R,Jazz, Classical I leave my PL in UL.

Jazz vocal divas-Ella,Billie, Sarah..etc I prefer triode, which "pushes" the band further behind the vocalist.

If I had to choose only one, I probably would choose triode.

Tablejockey, thanks for your response. That's exactly where my ears seem to be taking me as well.

+1 @tablejockey , Who describes the trade-off precisely. I prefer the lower distortion of triode, even with the slight reductions at frequency extremes, with my Mesa Baron, for virtually all music except loud rock.