How about something you like and are infinitely familiar with? Picking a speaker is a very personal choice. That said, if the music is of an acoustic nature, recorded and mastered well and possibly female vocals are involved it will better help you delineate if the sounds your listening to are creating the illusion of real live music or not, because... isn't that the goal?! Soundstage, micro and macro dynamics, pace, texture, air, bloom all this audiophile stuff is great yet.... One technical suggestion I would offer is to audition speakers only with your amps or amps like what you will soon own because these two components share a very symbiotic synergy between them performance wise. For me, it all comes down to weather or not it moves me with the visceral emotion of a given live performance be it rock, folk, jazz, whatever. I would caution you against using so called HiFi recordings that are not a part of your usual listening. This approach will just confuse the already complex journey of speaker shopping that you are about to undertake. I hasten to offer my choices as they may not be probably part of your regular listening and I prefer to use analogue recordings to audition equipment because of all the ambient and textural information that it has over a digital equivalent. I really am not trying to po po HiFi recordings or digital formats as I own both to some limited extent. I hope this was helpful to you. Have fun.
Happy Listening!