The best speakers in the world are the ones you like the best until you've heard something that you like better. Then even when you think you've heard them all and have settled on the best of the best, that same company will come out with something better.
Plus, no matter how many great speakers you get to listen to, there are a zillion extraneous factors that will come into play in terms of your subjective impressions of them. First, there is the room that they're in. What size, what shape, what kinds of rom treatments, how it was lit, what kind of flooring, how the speakers are positioned, what distance you're listening postion is from the speakers, the volume level you've selected, the music you've selected, the format of that music, how well it has been remastered, how familiar with it you are, what time a day it is, ambient room noise, when and what you last ate, whether your breath is fresh, whether your wife would rather be doing something else, the CD player being used, or worse yet the turntable, cart and phono premap being used, how well it is set up, the preamp, amps, cables, racks and other tweeks, whether you have any preconceived notions about the speakers themselves or any of the associated equipment, whether you know what they cost, and a few other things I'm forgetting at the moment.
If you can control for all of that and can still manage to do quick A/B speaker comparisons by having the world's fastest and strongest man move one set of speakers out of the way and immediately place the next set of speakers in that same position, connect them up, and component match to suit the new set of speakers (almost for sure that means different amps at a minimum), then you can get a pretty good idea if you like A or B better. Your friends may not agree, but that's Ok.
So just repeat this process about 1,752 times (which, last count, is the number of times I've read a "professional" audio reviewer claim that "X, Y, or Z is the best set of speakers I've ever heard and thus has become my new reference"). At that point you would have heard them all in a fairly well controlled environment, and thus you'll be able to decide for yourself which speakers are the world's best.
This is, of course, assuming that you can listen to the same song 1,752 times in a row without suffering any listener's fatigue, short term memory loss, hunger, thirst, or abdominal pain from puking your guts out due to the sheer boredom of it all.
Otherwise, just do some reading to find out what the usual suspects are within your budget, audition a couple of them, and make a decision. You can always upgrade later. We all do.
