Cool, I think our ears are similar.
Yes, Tone Tubby are expensive too. I actually have a nearby shop that build there own enclosures and has some of the best prices comparable with Avatar and US Speakers. They carry Tone Tubbies, Celestion, Jensen but no Fanes or Eminence.
Anyway, I suspect the Tone Tubby sound a little rounder smoother and great for Carlos tone.
Funny, I have Fane Crescendos, they sound great with Mark IIs but too harsh for Trem-o-Verbs yet Fane Axions sounds great with Trem-o-Verb which I now prefer over the Vintage 30s.
Its that I'm a pack rat and saw a Fane Axion at a used shop for $50. Same with Celestion Vintage 30s, used for $55, $55, $50, Heritage $30 (the first reissues), Kendrick Green Frame $30.