For mid gain rhythm sounds, the Brit 800 (for less gain) and Brit 800 #34 (for more gain) were always my favourites, but I also discovered not too long ago how excellent the FAS Crunch is for that. It sounds different, and often better. I think I have to look more into the Hotrod model, too. Last time I tried it I found it a bit overwhelming, but that might have been an issue of selecting the wrong cab - I think I tried it with legacy cab 54, the Pre Rola 55, and to me that cab has a very distinct, very powerful and "dominating" tone, so I will revisit the Hotrod and try other cabs.
With the Class-A, I must say I still prefer some of the modeled "real" amps for their distinct tone, especially the Vox AC30 and the Trainwreck Rocket.
I don't need many high gain sounds, but when I need one, I find the FAS Brootalz is devastating, in the best possible meaning.