@jjss49 … I realize this is an old thread, but I’d like to reply anyway. I bought the 1.7 and had them for 4 years, then upgraded to1.7i and had those for about 5 more. Two years ago I replaced them with the 3.7. I used Sound Anchors stands with the 1.7i, and use the MYE stands with the 3.7. In my system, the largest improvement was going from the 1.7 to the 1.7i. The Sound Anchor stand was a slight improvement over the stock stands on the 1.7i, but well worth the $300 IMO. Going from 1.7i to 3.7 was an improvement for sure, but the cost of that upgrade was large, and the improvement was smaller by comparison. The MYE stands for the 3.7 gave a slight increase in the amount of fine detail, but seemed to reduce the fullness of the lower frequencies… maybe rendering them tighter, but leaner. Years ago I replaced the 1.5 Q/R with the 3.3/R, and that was a huge improvement. Then I replaced the 3.3 with the 1.7… the sound was better overall, but the top and bottom of the sound spectrum had been a bit better with the 3.3. The broad mid frequencies were clearly better with the 1.7, so I chose to keep them. When I upgraded to the 1.7i, I got much of the highs and lows back, and the mids were even clearer. Moving to the 3.7 slightly improved the higher frequencies, and also the sound staging to some degree, but did not give me the increase in bass response I expected. That may be due to the balance of the individual speakers. I tried resistors in the tweeter and midrange positions on the input plate of the 3.7 to balance them better, but the resistors dulled the sound too much. I’m considering getting higher quality resistors to try, but for now they’re out. So I’m currently listening to the 3.7, and enjoying them very much, but I’m not convinced that the time, effort, and cost involved in going from the 1.7i to the 3.7 was worth it. To be clear, the 3.7 IS “better” than the 1.7i, just not “substantially” better. Best bang, for me, was the 1.7i with Sound Anchors. I could live with them quite happily. One more point: I’ve been using one model or another of Magnepan speakers for 36 years, and during that time I’ve tried other good speakers, but always craved the “sound” of the Maggies. Happy listening!