The SET amp question.

At 110 db/w, you would have the luxury of being able to use just about ANY kind of SET. I would certainly consider 45s and 2a3s, because the higher power of 300bs and 845s and 211s would probably not be needed. It is a matter of taste, but these may be, to you, preferable to the other, more powerful tubes.

Everyone has done a good job explaining the differences. As for a recommendation of brands, Don Garbers "Fi X" is a great amp to try out. I think with your speakers, it will be a great match.

I would also put the late John Hogan SET's on your short list. I've owned two (one was a 2A3 & 45 and the other that I still own is a 300B), both bought without hearing first, and can only be described as AMAZING! I used both with my 99DB and 101DB Klipsch speakers.

As has been said, it's a magical midrange that just has to heard.

As Larryi stated, 845's can give the benefits of SET plus substantial power (in a relative sense). I highly recommend the Art Audio Carissa SET amp at 12 big watts. It convinced me that all this is not hype but an exciting way to go.

I was I had the luxury to try some of the low powered SETs with high efficiency speakers - if I did, I would be very eager to try the Music Reference EM7 since I have found their RM10, RM9, and RMSEs to be exceptionally good PP amps. I think there are now some reviews out there, but you can be sure any amp by Roger Modjeski will sound very good, measure well, and be reliable. I think the 2.5 watt version of the EM7 is $750 (there is also a 5 watt version for less than $1,000). The Wright 3.5 would also interest me based on feedback from owners of his amps and this one in particular - don't know the price, but his stuff is generally very high value.