Boy OH!!! Boy!!!! lots of speakers mentioned here most of them very very good others only good in the minds of the people commenting here, who's to judge them I certainly can't, Especially the guy who liked the sound of inferior electronics with the Monitor Audio versus his Sonus Faber!!! . . Go figure . . .
I think the speaker will faithfully reflect the upstream chain of equipment you are listenning to even the microphones used in the recording, the most important about the speakrs I think is to mate the amplifier well with them.
Example a pair of NHT SB-s'3 and also Classic 3's that I had in my office a while back if you use Aragon 4004-MK-II's there was one typ of sound bell balanced transparent, very well controlled, etc. the Threshold S5000e produced a more lively sound more musical more dynamic, then there is a big surprise I have and old Sunfire Cinema Grand that I no longer use in my HT rig so, I decided to try it as a 2 channel option with the setup and OH MY!!!! it made the speakers sing with joy, I never heard that amplifier sound so good, granted I was using hi calibre power condiitioned from Running Springs Audio and from Exact Power, granted more money from power conditioning than in amplifier I reaquanted myself with this amp that mnade the speakers really sing.
As you see the synergy between component smust be there or you're wasting your valuable Re$$ources . . .
Among the best speakers I have heard are the Merlins, the Von Schweikerts smaller models VR-3 VR-4's (Not the bigger guys) also Eggleston Works Andra's were very convincing argument; of course I don't recall the exact electronics being used on them except a few Wilson Watt/Puppy driven by ML Digital set-up and Spectral amplifier and preamp, (WOW MAJOR WOW!!!), also Vienna Acoustics with Krell electronics and probably the most intimate experience out of the known speaker brands I had with Sonus Faber driven by Pass Electronics, something about that combination really makes the hair in the back of your neck stand out . .
Also made the cut MArtin Logans (the bigger models )not the smaller guys), driven by Classée amplification and pre and also some old and almost lost Hybrid Moscode and also a combination of preamp-less Marantz Cd player w/ volume control direct into Audio research, Classic 60 (I think) into a pair of Vandersteen 3's also my memory bring that back as a very intimate listening experience again raise the hair in the back of your neck.
I will be listening to an fairly Uncknown manufacturer of speakers from Australia called Wide Horn Technologies claimed an efficiency of 95 dB/W/m you can probably make this speaker sing with 10 to 15 watts of good power.
If so then any well built A/AB class amplifier will always drive them on class-A and make them rock, wee shall see is a few weeks,
Something else, speaker cables are essential component a speaker that will sound not very interesting with one type of spealer wire will sound just right with a different cables.
I don't think there is an absolute best speaker out there they all more or less better in differecnt areas.
I still love a pair of NHT 3.3's I own in my HT rig however I relize there are far better speakers now. Again depending on amplifiers used, speakers can sing or sing, and tap dance, and show you their spirit, and . . ..
Hope this helps a little;
Take care; enjoy the music and try to go to a live concert once in a while so you keep your point of view original not comparing against this system against that system, etc.
Gonzalo