I just saw the C90s on Mesa's site...still available. I have 2 for sale, so I was wondering if I should up my price, lol!
Personally, I use 3 different speakers, depending on the amp. Most of the time, I use an EVM12L along with a Celestion Redback. I have a Mesa vertical 2x12 with one of each of those in it. I also have 2 Thiele cabs, 1 with the EVM, the other with a Redback. In a different 2x12, I have a WGS Invader 50 paired with an old Celestion G12M-70. I primarily use that cab for Marshall-esque amps. For my damaged ears, all those speakers deliver the tone I like to hear and feel. I've replaced the Creamback in my BL25 with another WGS Invader 50. That little amp is a pure rock and roll machine.
My TC usually gets the Mesa vertical. Even though that amp is British voiced, I prefer it through that blend than with the Invader/Celestion blend. Those speakers tame the brightness and add more growl. Another great trick is putting a graphic EQ in the FX loop. Adding some low end girth to the TC delivers a crushing tone.
Just noticed the C90 speaker on Mesa's site has "add to wish list." Maybe I do need to bump my price, lol!