A list of efficient speakers at ~$5K a pair.

Audio Note AN-K/lx should fit the bill and be around $5K.

Martin Logan XT line...take your pic but they are 4 ohms..

Great sale going on at Safe & Sound Audio..

Omega Speaker Systems Super Alnico XRS should fit the bill.  Check them out 

I think you're overcomplicated this process. Listen to the music and choose what sounds right "to you". I personally own Tekton Moab's. High efficiency (98 dB), marvelous low end extension (no sub required) as well as what I would characterize as "makes me tingle all over" mid-range and high frequencies. No, they are not perfect, but then, in all honesty, nothing out there really is. It's all still very personal.

I use the First Watt Sit-4 and Pass Preamp with my Volti Audio Razz the best sound of my life..10 watts of glorious Class A with out the tube problems and expense..