High impedance Speakers


I've read here and there about the benefits of using speakers with high impedances, especially with low power tube amps, but there don't seem to be a lot of them out there. I've identified a few:

Coincident Victory, SuperEclipse, TotalEclipse: all 14 ohms
Coincident TotalVictory: 10 ohms
Omega TS33: switchable 4 ohms/16 ohms
Zu Cable Druids: 12 ohms

Can anyone add to this list?
rdenoble
Classic Audio Reproductions makes two 16 ohm speakers, the T5 and the T1, which are both moderately high efficiency too (95 and 97db respectively).
Ah, Ralph, now that I see you have added your wisdom to this thread, it popped into my mind that you are the longtime guru of this topic!
The older Altec alinco drivers from the 60s were 32 Ohm with over 100db. That's even easier to drive with less than 1 watt of juice. : )
Their 3 BPC is switchable 4/16 ohms (in dipole), and 8 ohms in monopole operation.