Looking for speaker recommendations that I can purchase on Amazon.com


Budget: under US$5000 and would prefer a price point of less than $3000/pair. The most expensive speakers I have owned so far are Polk RTi A7's, so this will be a big jump for me.

Purpose: music

Room: I tend to move every few years, so I don't want speakers that will work best only with very specific room conditions. Currently, I will be using these in a medium size room of about 22 feet x 18 feet. The room has carpet and window treatments.

Music sources: CD's, lossless music files stored on computer and MP3's when that's all I have available. I don't ahve any SACD's yet, but I plan on purchasing more high quality music once I have this system set up.

Music styles: acoustic, Indian classical (sitar, srangi, flute), alternative rock (Portugal. The Man, Sleeping with Sirens, etc.), older rock (e.g., Rush).

The speakers should sound good playing the Tanpura (aka Tambura). It is a classical Indian accompaniment instrument in the "drone" category. (https://en.wikipedia.org/wiki/Tanpura) Example of sound here:
https://www.youtube.com/watch?v=F7tlqXix_eo
With bad equipment that sound is fatiguing to me. Live it is beautiful and relaxing. Hopefully I can find speakers that will do it justice.

Personal Preferences: I am looking for non-fatiguing, warm, musical qualities. In another discussion topic here on this forum, @mtrot and I agreed about "smooth, sweet, soft, silky treble" and "shimmery, airy cymbals" as goals.

Amplifier: Yamaha P5000S

DAC: to be determined, but probably something like the Teac NT-503

Finally, the speakers of choice must be sold on Amazon.com, Bestbuy.com (or possibly some other similar retail website). I have personal reasons for this limitation. It isn't always true that I will need to buy all my speakers or audio gear from one of these sites, but for the moment, it is a requirement. Please don't recommend anything that isn't available on one of these sites. Thanks.

lowoverdrive
I own both Kef LS 50 in my 2ndy system powered by Parasound Halo HINT. a 2nd pair of LS 50 W purchased from amazon  for my home office you just can't go wrong with them for my bedroom I have the Audioengine HD6 totally non fatiguing and inexpensive A/B amp powered speakers !
I was not extremely impressed with the LS50s I heard and they were powered by the Parasound Int. They were good for certain types of music but sounded bad with rock. Almost everyone I read about says the Ws are on a different level. 
A_shaw, since you own both can you compare them. 
LS50 as well as the R series are rolled off in the highs a bit, so polite - yes, bright no.
I'll add a couple recs I like on Amazon:
Dali Opticon 6 or 8
Martin Logan Motion 60xt
Alta Audio Rhea

I also like the Tannoy and Elac recs above - I like the real Elacs with the Jet tweeters better than the Andrew Jones lines personally. I would scratch the SF Chameleon off the list - there are much better options in this thread.