High efficiency is critical.


I am looking to move on from my Klipsch Heresy speakers. I have a 2A3 power amp so high efficiency is critical. My budget is somewhere around $1500-$3000. Opinions and experiences welcome. 
fromunda
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For that budget range, look at speakers from Decware, Omega, and Zu Audio. If your Heresys are first gen, you could upgrade to the IIIs, then take them a bit further with outboard crossovers from ALK.
You could also go with a used pair of 604s.  I do and augment the bottom and I couldn’t be happier. 
Try to find actual test results for sensitivity.  The two Tekton speakers reviewed by Stereophile found that the actual sensitivity of the speakers was abut 6db (!) lower than advertised.