I'm one of those people who so swears, but with one very important (and unfortunate, for McIntosh) caveat: If you only ever heard a 275 with the stock Russian/Chinese tubes, then you have no idea what it can do! But short of actually hearing one properly tubed, I direct you to Steve Hoffman's very eloquent description of the difference, in his tone mag review, issue 9, I think.I know others though that swear that the MC275's makes even the most mundane music sound like a choir of angels!