Statman, This is exactly what I was talking about. The Classic 120s actually have twice the power of the Classic 60. I have owned both and both are great amps. You forgot to mention the soundstage was bigger with the monos.
Audiofeil, I did the 300B thing and decided it didn't work since those amplifiers are not capable of driving real world speakers.
And speaking of inexperience, you may think VAC amplifiers are something special, but it wasn't that long ago VAC was not a well received product because of competition like the Audio Research Classic 120 which was a much more flexible and better sounding amplifier on a broader range of speakers.
At the same time, VAC was marketing Chinese tubes under the name Golden Dragon. These are the tubes that were used in VAC products. We called them Chinese firecrackers because of their short life expectancy.
I always buy equipment from reputable companies and as a rule mono amplifiers will give superior sound and that is a fact.