The 845M is smooth! Smoother than the 845B. IMO the treble is not forward, or irritating as you seemed concerned about. But the 845M is no longer in production unless Supertnt.com has started back up with a new version.
845 or 211 based tube amps?
Are there any unique properties of the amps based on these tubes? Are 845 & 211 interchangable? Which are 845 & 211 good tubes that are cost effective & reliable?