No. Highly efficient speakers are generally less accurate than "lowish"
efficiency speakers. They tend to become unlinear at high outputs.



Mmmm now were getting interesting.

From my own experience of building everything from 1/4 wave baffle to v.
large transmission line (only ever built 1 of the pair - size of a wardrobe
with 12" bass driver) I have always felt that l/speakers (or more accurately
the boxes in which they are mounted) are the weak link in any hi-fi. Record
decks, amps cd players all work within fairly easy to define sets of
physical parameters - Speakers don't. The interface between a speaker and
the room in which it is used is not easy to define and often changes over
time (people move around, furniture gets moved, doors get opened or closed
into the room etc. etc.)
I have often found that the easiest way to deal with bass is just not to do
it at all! Small, sealed (infinite baffle) enclosures made with very heavy
damped panels and a simple crossover using very high quality drive units
often sound fantastic (BBC monitor LS1 fans may now smile smugly) BUT they
need vast amounts of amplifier power to produce any response below 100Hz
(and no - a subwoofer is not the answer) Fed with a low power amp (I used
to own an old 8watt amp which produced superb results - I have yet to hear
a better mid-range) But it's not Hi-Fi! Sounds great until you hear "live"
music again and realise that there is a lot more going on than just what's
being shown through your, admittedly very clean, small window on the world.
Check your own hearing response - you might be surprised at how little HF
information you can "hear" (which doesn't mean that anything above your limt
of hearing isn't playing a part in what you perceive as a leading edge or
transient sound -- but that's a whole other debate!
I often wonder when live music was last heard when I listen to dealers demo
or show set-up of hi-fi - There is a definite "hi-fi sound" which bears no
resemblance to real world music or sound.
Listen to simple sounds through anything which you intend to buy.... Solo
piano is an acid test, as is speech - record a radio Scotland (or radio 4 if
your not lucky enough to live in this neck of the woods) interview and burn
it onto CD. Play it in the shop and see whether it sounds "real"
Once the mid range is "right" then start to worry about the top and bottom
end.
And that's when the zeros start to appear at the end of the price tags!