What is your take on high efficient speakers vs. low efficient speakers?

I agree with audiokinesis. Although a speaker's sensitivity should be considered when matching them to an amplifier, it would be wrong to use the sensitivity rating as an indicator of quality. Many speaker designers opt to trade high sensitivity for deeper base production, especially in smaller enclosures. Remember also that generally a tube-powered amplifier will seem more powerful and play louder than a solid state amplifier of the same or similar power rating.

I'm on my third pair of Magnepans.  Sensitivity is rated at 86db - very low efficiency.  

I've owned Altecs, Advents, KLH, Klipsch, Nola, Allison, B&W 802's which cost a fortune. 

Nothing comes close to the Magnepans.  

I'm on my third pair of Magnepans.  Sensitivity is rated at 86db - very low efficiency.  

I've owned Altecs, Advents, KLH, Klipsch, Nola, Allison, B&W 802's which cost a fortune. 

Nothing comes close to the Magnepans.  

I like small and functional. Therefore I tend to not covet full range high efficiency speakers which will always be larger and therefore also more costly.    There are really only a handful of high efficiency speakers I would ever practically consider given the options.  Most people would agree which is why good quality lower efficiency designs are so much more common than the alternative these days. 

@sbank 

Duke is wise.

Agreed, and humble.

Charles