I agree with Larryro -- never have I heard anyone say the Mk I was better than the Mk II. It is the opposite -- the Mk II is more powerful with a beefier power supply, a cooling fan, and some circuit changes. It would be more accurate to say that many people prefer the Mk II to either the Mk I or the Mk III. More than once I have heard the Mk III described as Larryro describes it -- perhaps even more resolving than the Mk II, but at a price in the highs. I had a VT-100 Mk II for sale, but changed my mind and kept it. It sounds great.
