Long-time owner of Maggies here. Had 3As in past and have the 1.6s now but will likely upgrade to 1.7s. A couple of things that really impact Maggie sound:
1. Room position and overall room size. The best I have heard them is using the Cardas speaker placement formula (planar formula). That really helped with my listening room.
2. Power. Maggies need lots of current, not necessarily wattage. My VT-100 amp is probably just enough to power them up; more juice would be better.
3. I prefer the tweeters on the inside which the manual suggests may not be good for the phasing. It works for me though after much experimentation.
Now on the 1.7s, what the team in Minnesota has started doing (and much overdue in my opinion) is upgrade the capacitor parts.
On the 1.6s I found that using internal bi-wire Kimber 8TC does really well. The 1.7s are not biwireable in this fashion any more.
My listening impressions on the 1.7 at Audio Alternative, our local Maggie dealer with large McIntosh amps driving them:
**Very open and clear midrange.
**Slight tendency to a brightness which may be due to sub-optimal placement or just needing the attenuator.
**Quality bass, especially the mid-bass a traditional Maggie strength.
**Even more cohesiveness across the range which was a 1.6 strength and better than the 3.6s.
Anyway, hope that is useful.