You will not get mids that blow you away with planars or cones if you don't put bass traps in the room. I'd start with a good amount of bass traps before buying new speakers. Something like GIK Tri Traps. They can be moved to a future room easily. They can go in corners, can be stacked in corners, can go along floor/wall boundaries too.
What you should get with planars over cones isn't necessarily better mids, but different mids. A more seamless midrange maybe. What you should experience also is the dipole deep and airy sounstage. Also the super fast quickness of transients, attack and decay, but once again, you won't experience this if you don't have bass traps. Poor bass response in the room will mask this. The other thing you'll need to do is commit to putting the speakers well out in to the room, further than you would cones. See the Cardas dipole calculator to see what the location is.
And you already probably know about the power you'll need.
The ET's have some advantages over Maggie 1.6s IMO. They arguably do not require as much current, but still need power. This can be a cost differentiators. Also, I would speculate you'd need to modify the Maggies to equal the ET's. And the ET's have high frequency adjustment. And you might need a subwoofer with the 1.6 but not with the ET's.
What you should get with planars over cones isn't necessarily better mids, but different mids. A more seamless midrange maybe. What you should experience also is the dipole deep and airy sounstage. Also the super fast quickness of transients, attack and decay, but once again, you won't experience this if you don't have bass traps. Poor bass response in the room will mask this. The other thing you'll need to do is commit to putting the speakers well out in to the room, further than you would cones. See the Cardas dipole calculator to see what the location is.
And you already probably know about the power you'll need.
The ET's have some advantages over Maggie 1.6s IMO. They arguably do not require as much current, but still need power. This can be a cost differentiators. Also, I would speculate you'd need to modify the Maggies to equal the ET's. And the ET's have high frequency adjustment. And you might need a subwoofer with the 1.6 but not with the ET's.