list of speakers

You're on a limited budget, but you still lust for your dream audio system.  The website you pointed us at doesn't include any mention of the Linkwitz designs.  The Linkwitz LX521 system (and it's a system, not just a loudspeaker) can be had as a DIY project.  You could probably do it for about $6,000 or so, total for loudspeakers, active crossover and class D amplification.  Being that it has an active crossover and not a passive one, it is more complex than your typical commercial product.  But in putting it together, you result in a system that is right there in any discussion of hi-end audio.   Visitors will leave your home with envy.  Trust me on that.

@grislybutter  Your response to my post really shows your lack of knowledge.  Any time you match amplification with loudspeakers, it's a system.  The crossover is part of it as is the cabling.  The Linkwitz LX521 *IS* a 2 channel loudspeaker, but seeing as how you know nothing, you know nothing.

@grislybutter All you have to do to clear things up is for you to read up a bit on the Linkwitz LX521.  Because it has an active crossover, it requires 8 to 10 channels of amplification, depending on how you choose to run it.  

Most all commercial loudspeakers use a passive crossover and you use just one 2 channel amp to drive them.  But with an active (It's call "active" because it is a powered circuit) crossover, you have separate amp channels for each driver in the loudspeaker.  There are excellent reasons for doing this not the least of which is that passive crossovers throw away much of the energy.  This is why so many pro grade powered loudspeakers use active crossovers and multiple amp channels.  

Active crossovers are vastly better than passive, but generally do not lend themselves to the commercial paradigm where the buyer purchases loudspeakers and then later purchases a better amp to drive them.  It's just much easier for audio dealers to work with and sell.

The LX521 is a two-channel stereo loudspeaker.  It first began as a DIY project designed by Siegfried Linkwitz, to be an extreme hi-end loudspeaker that a home builder could do.  It was so successful that a commercial version was created and is sold in Europe.

Because it involves the loudspeaker enclosure, a 4-way active crossover and 8 to 10 channels of amplification, it is often referred to as a "system", and not just as a loudspeaker.  You can buy the whole system delivered to your doorstep, with amplification, cabling, as well as loudspeakers (offered in a variety of finishes) for a bit under $30,000 US.

You can also build it yourself with a kit from Madisound.  This could be done, including amplification, for as little as $6000.  It's extreme hi-end that we mere mortals can afford.  There are other ways to get into the LX521 that don't require you to be a wood worker.  Madisound sells a flatpak CNC cut kit you could build them from.  They also have cabinet makers who could build the enclosures for you.  They also sell the active crossover.  Building the system yourself teaches you a great deal about audio and gives you a vastly greater involvement in your system that a straight commercial purchase can never do.

You began your original post talking about your dream loudspeakers.   You never see the LX521 loudspeakers on the used market because they really are extreme hi-end and are the "forever" loudspeaker of their owners.

Because they are not a commercial product shown and sold at any USA audio dealers, there is a network of people around the country who are available for you to visit and listen.  Making a choice like this only makes sense when you've heard them for yourself.

@grislybutter  I've been an audiophile since Nixon was president.  The last commercial loudspeaker I ever bought was my college dorm speakers, the KLH Model 32, which were the lowest cost speaker one could buy at the time.  Since then, everything I've owned was a home-brew of some sort.  Kit loudspeakers were designed by solid professional engineers.  You don't have to be a Master's Degree Electrical Engineer to get a good loudspeaker.  I tried my hand at designing and building some speakers, most of which came out pretty good.  The most difficult part of building a loudspeaker is making it look like good furniture.

When you "get your hands dirty" in building your own gear, you become much more involved in your system.  There's an exceptional amount of pleasure and joy that comes from building your own, even if it's just from a kit.  When you're in this passion of audio, you become an audio engineer to some extent.  The deeper you get into the weeds, the more involved you become and the more informed are your choices and results. 

Siegfried Linkwitz was one of the truly great audio engineers. He's the Linkwitz of the "Linkwitz-Riley crossover."  You'll see that mentioned many times in audio.  Siegfried lived in Corte Madera, California and was more than welcoming.  Just a friendly guy.  He chose to create something for the DIY community that would give them access to an audio experience they could have never afforded before. He was just a nice cat.  He passed away 5 years ago, but left a wealth of knowledge behind him.  His website can take you days and more to read through and learn from.  Everyone on this forum is trying to improve their systems and learn from each other.  Siegfried's website is one of the great gifts to the world.