I've been around & I've owned many Top Shelf High Gainers:
Elmwood Modena M90, Diezel VH4, Einstein, Engl Steve Morse Sig.
CAA OD100SE+ VHT UL, Bogner Uberschall Rev. Blue, Soldano SLO,
Splawn Quickrod, Modded Marshall JCM 800, Mesa Dual Recto, Randall
V-Max.
I know that Tone is subjective to the player, so opinions are
always gonna vary....but for me, after all these years of playing
and owning many different amps, the two that cover all of the bases
are the Diezel Herbert 6505 & Bogner XTC 101B.
I wish I could have kept all my amps, but in the grand scheme of things
it was necessary to walk that road to end up in "Tonal Heaven"
My next acquisition to the flock will be the 2 channel Fortin Natas
when It's available.
Here's a cool vid. I found of the various XTC Tones.
[YOUTUBE][/YOUTUBE]