The funny thing is there have been speakers in my life that sounded GREAT at the store and I got home and they sounded plain BAD. So I agree that room acoustics are very important!!
Also, and some people might disagree but to my ear some receivers make the speakers as well. That is why I try to listen at the store to the speakers using a receiver that I use so I can better compare the sound.
Normally I buy speakers at a store that will return the speakers without a restocking fee... Though I finally took a dip in the Craigslist pool and found that I really like the Infinity Interlude series. Luckily I had someone near me sell me my towers so I got to listen to music that I had brought over and my receiver that I took out of the rack for this listening test as well. It worked out... I love the towers, they sound Excellent to me.
I have not written this yet, but I will be more extensive latter when I post the comparison between, Inifinity Interlude Series, Canton, and Sapphire (When I get some more time, spent a lot of time on Sapphire thread yesterday, right Bandphan), but I also took home a pair of open box Canton's to compare sound once I bought the IL40's on craigslist.
Out of all the speakers that I listened to that were new, the Canton to me was the best, (Martin Logan, JBL, Mirage, Vienna Acoustics, Def Tech, Klipsch Reference, Snell, Focal, B&W, Thiel, and newer models of Inifinity), Canton was the best to my ear (in my price range), of course Snell, Thiel (the best sounding speakers I ever heard!!), and Martin Logan were good, but a little expensive as well. I could have fit ML's in my budget... but I liked Canton better, and would have chosen Canton over ML.
But comparing the Canton's, Sapphire's, and Interludes there were differences... and like the OP said, wish I could own all these speakers and be able to go to the speakers that sound best with that type of music.
So in conclusions, speaker depend on the environment, the receiver, the set up, the music, the movie, and most importantly individual tastes- - - If it sounds good to you... then you have the right speaker... someone told me that here not in those words but something like that... bandphan, perhaps?!?!? Anyway, I love this obsession that I have with electronics... keep the posts coming!
Happy easter everyone that celebrates easter to those who do not ... happy sunday!