Back to which non-planar one could chose, I'm surprised few (none?) have mentioned line-arrays, as one of the attributes of an ML ESL is that it does indeed project as a line-array.
So for me, the best commercial line-array out there now is the Scanea
But there are any number of cool kits or DIY Line-arrays that deliver amazing performance at a fraction of the cost of some of the box models being discussed.
Personally, I'd DIY some 7' or 8' tall arrays using the following drivers:
Highs - An AMT-based tweeter, the super-sized
DaytonAudio AMT-4 pro
Mid-bass: A superb 6 1/2" or 7" driver that can play clean up into the 1.5Khz range with super-low distortion characteristics (there are several that qualify)
Build a suitable baffle for the drivers, use exiting speaker processors and amps and I could have something like this for under $10K for all five speakers.
From a pure dynamics perspective, that would be better than any ML.