I have successfully mated the Sound Quest SQ-88 amplifier (55 watts using 2 KT-88 tubes per channel) with the Von Schweikert VR-4jr (89 dB) and the AAD 2003 (88 dB) among other speakers. The KT-88 tube has great bass control. The combinations above play driving rock music into my approx 20x26 room at house shaking levels. So, in my experience, ~50 KT-88 tube watts is more than adequate for your application even with speakers below 90 dB efficiency.
In addition to the makes you are looking at, appropriate Consonance gear can be found used in your price range. There is a Consonance Reference 880 integrated amp listed right now on Agon at a great price (less than $1000 ... I have no affiliation with the seller). The 880 uses 4 tubes per side producing 70 watts per channel. Put some JJ blue KT-88s in that thing and let 'er rip!! (I wish someone would buy it so I am no longer tempted.)
Enjoy!
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In addition to the makes you are looking at, appropriate Consonance gear can be found used in your price range. There is a Consonance Reference 880 integrated amp listed right now on Agon at a great price (less than $1000 ... I have no affiliation with the seller). The 880 uses 4 tubes per side producing 70 watts per channel. Put some JJ blue KT-88s in that thing and let 'er rip!! (I wish someone would buy it so I am no longer tempted.)
Enjoy!
.