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.
What is your take on high efficient speakers vs. low efficient speakers?
Consider both designs are done right and your other equipment is well matched with the speakers. Do you have any preference when it comes to sound quality? Is it matter of economic decision when it comes to price? - power amps can become very expensive when power goes up, on the other hand large, efficient speakers are expensive as well. Is your decision based on room size? I'd love to hear from you on the subject.