Sorry I can't comment on the Vistas. But...I have a friend with M-L Montis with a 16 tube AR amp and I've never heard M-L ESLs sound as good. Great match!
Martin Logan speakers
Are Martin Logan speakers still considered to be high quality speakers? (I have an opportunity to buy a used pair of Vistas) I have an old Audio Research VT130 amplifier. Would it be a good fit with the Martin Logans? If not, what would be better, but not outrageously expensive?