I think it is helpful to know of non-horn alternatives that deliver similar sound. While I am a fan of certain field coil drivers, the ones I like are above the $17,500 price range. Also, it would be helpful if specific speaker models or drivers are mentioned. Most current field coil drivers are full range drivers used as single drivers in a speaker system or as a wide range driver in multi-way systems. I like some systems using single drivers, like the Songer Audio systems, and the PereAudioAproject open baffle speakers with woofers and field coil midrange/tweeters. Field coil drivers that are similar to regular woofers and tweeters are employed in the two-way Audio Note AN-E speakers. I like these speakers too. Field coils are used in horn compression drivers, like ancient Western Electric 555 drivers and currently manufactured G.I.P. replicas. These sound great too.
I have heard dozens of field coil systems, and most are very good sounding. But, I’ve heard equally good permanent magnet drivers and systems so I don’t think that nothing else compares to them.