Tube amp suggestions for Divine Acoustic speakers

triode/ultralinear gives you optional power ratings; and mono capability gives you the opportunity to double up in the future. You might limit your search to amps with those features.

I agree, I would want 35 wpc or more for instantaneous peaks.

I really would not want to try driving 89db speakers with just 2 watt as others have echoed. 

A used AirTight ATM-1 or Leben CS660p would be good match. Brand new I would get a Lab12 Suono or Suara.  

After hopping about hifishark, I would research these

Rogue Audio Stereo 100

BAT VK-60 just listed here

Margules 280U-SC

VTL MB-250 (listing says amp, photos show two, possible he meant the pair, forgot the S?

Carver Crimson 275, new on sale at underwood hifi, 5 yr warranty

If you can score the Carver Crimson 275 for $2750 as advertised on Underwood's website, I'd do it in a minute. His 'homage' to the McIntosh MC275with the kind of original thinking and tweaks only Bob Carver can do, plus a very conservative design relative to tube life, that would be a no-brainer for me. At 75W/Ch it may be a bit more power than you would otherwise buy, but I would just consider it extra headroom.

My second choice would be an EL-34/6550 roughly 40W/Ch Amp. A restored vintage McIntosh MC240 would be great, but a more modern interpretation of that basic architecture would also work very well.

I would take a close look at the Prima Lun 200/300/400 models. They're kinda textbook examples of the most common approaches to the EL-34 design world: Triode and Ultralinear, plus tube options including the EL-34, KT-88, KT-120, and KT-150. I'd probably lean towards the KT-88, but that's just me.

Check out Audio Mirror 45 Watt SET monoblocks. Easily drove my 87dB speakers beautifully. Loved the sound.  And Vlad provides excellent customer service.