Not sure if your referring to me, but I'm a Mesa and A Fuchs owner both of which I own not just for their high gain ability but also for their clean tones, especially the Fuchs. Anyhow, I'm very familiar with the Carvin Vintage Series, specifically the Belair 2x12. My friend owns one and I've played it many times. It is as their description on their website decscribes. It is a great all around amp. Although its power section is EL84 based, I would compare this Belair to a Twin any day and I'd think you'd be surprised. And No, Carvin isn't necessarily known as a High Gain amp manufacturer, but they do make a few different series of amps each with their own character.
http://www.carvinguitars.com/products/s ... uct=BELAIR