I like both the 1.7 and the 3.6s. I believe that the 1.7s have this smoothness and coherence that I do not hear with the 3.6s. I got to audition the new 3.7s and I found that same smoothness and cohehrence that I heard with the 1.7s but much better. The 3.7 have much clear midrange than all the previous magnepans along with better frequency extremes than the 1.7 and the 3.6s. For difference in money buy the 3.7s They are a giant killer.