Never mind, Google answered my question - d'oh!! As for hi-efficiency speakers, the Zu Audio and Cain & Cain offerings elicit high praise. I would look there for something suitable...
I would recommend the Cain & Cain Abby, possibly with a sub for rock music - very lively, very engaging presentation.
I ran my Abbys with a Fi 2A3 amp for several years, which made for a great combination. I also heard another 2A3 from Bottlehead which worked equally well - the 2A3 seems to be just the right tube for the Abbys.
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