Reasonably sensitive speakers for tube amps, max $2k/pair, new or used


While this topic has been covered before, I'm interested in both recent experiences with new products or anyone who just would like to chime in.

I have a couple friends interested in tube amps, lower wattage -- 40 wpc or below. Before they pull the trigger there, they need to find the best higher sensitivity speakers they can, hopefully at $2k or below, new or used.

QUESTION: What high sensitivity speakers would you recommend to them, new or used? What did you try and NOT like?
Characterizations of their sound, experience with a trial period, the company, etc. appreciated.

I'll pass the best answers and links along to them.
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A Quicksilver Integrated Amplifier, rated at 20 watts, works great with my Focal Aria 906 speakers cited as 89.5 dB sensitivity. I listen at moderate volume, and the volume control sits around 10:30 o'clock.
@charles7  I heard the QS Integrated with Dynaudio Evoke 20 and it was very good until about 77 or so db and then it got a bit distorted. Those speakers are 86 db and 6 ohm, so it was probably a bit much, but I've heard tube amps really like an 8 ohm load, so that's probably a factor.
I have two systems…8 watt SET with linear tube mz2 as the pre and open baffle Cantuck audio lil 15s.  Lovely in my small room….give the speakers 2-3 months to open up.

my other system is in a much larger spac.  Includes a restored fisher x202b with Klipsch fortes upgraded with alk crossovers and crites tweeter diaphragms….great sound.  The alk crossovers really took the edge off the fortes, highly recommended
I guess I have $1,200 in both the Cantuck lil 15s and Klipsch fortes, so either meets your budget
Used Legacy Signature IIs or IIIs between $1600 and $2000.   Easy to drive 4 ohm, 94 db efficiency,  3.2 ohm min.   6-10" woofers, dual midrange, soft dome/ribbon tweeters and rear ambience tweeter.  Gorgeous sound with tight, punchy deep bass.  Can't be beat at that price.  Drive nicely with 30 watts including a 1978 Yamaha CR620 receiver or a high end VAC amp.  Superior dynamics and bass to a Magnapan and soooo much easier to drive.