Over the years I've read scorn as well as praise for the sound of the Paragon. I can only add my humble opinion, as I happened upon one some 24 years ago (ca. 1960 build). For years, the 150-4C woofers (no foam surround) needed EQ until they appeared to break in(!). Subsequently, I've added two 2405s in parallel with the O75s in addition to some minor tweaks. Most recently, I put a McIntosh MEN220 into the mix. Now, I bi-amp the Paragon (MC2105 on the bottom and vintage MC275 on top) with the MEN220 and engage RoomPerfect as well. As a result, the bass has bloomed and the sound has smoothed out nicely (for my ears).
I'm a musician, as most of my friends are. I've always believed that the way to evaluate audio (and it's never really transparent), is to listen to music that depends on no reinforcement or electronics for the propagation of its sound - hence natural instruments, classical music, etc., works best for me this way. There have been many times when my wife (also a professional musician) mistook the sound of the Paragon for my Steinway grand. I've always maintained that no one did piano like JBL, strings like KLH, Wagner like Bozak, etc. - we all have our favorites.
Anyway, the Paragon never fails to delight and impress my friends and for me, it appears to do very very well in every type of music.