I have been a long time ribbon speaker enthusiast for over thirty five years. A while ago, I started asking, then why are the vast majority of speakers dynamic? There are lots of reason. But it set me to exploring and now I am a very strong supporter of them. While alternative speaker types excel at some attributes, they typically are not great overall. For the specific benefits come some significant compromises. And if you are not willing to adjust your electronics to suite ribbon, or horn speakers, you will not be getting the best.
I think, in general, especially when on a budget, good floor standing dynamic speakers are your best all round solution. One attribute I did not understand with earlier speakers I owned was coherence. The "same sound" top to bottom. Once I moved to full sized floor standing speakers I understood coherence and really appreciate it.
I would recommend auditioning Sonus Faber (natural / musical), B&W (a bit top and bottom heavy... really good for Rock), Wilson (great imagers... buy used), and DynAudio (outstanding detail). Totem might also be a good choice... not as "audiophile like", but really pleasing and music speakers.
Find the "sound" you like. Then you can build up the rest of your system to get the most out of them. With $6K, I recommend used. You should be able to get a speaker from the $10K original cost range... and that is going to be a much better speaker.