Ult,
I think you have a lot of options with your gear, particularly that amp, OHM included.
I think your listening room/acoustics and listening habits may be the thing to determine the best solution.
One thing very unique about the OHM line is how it scales up and down based on room size.
Emerald physics is most different from the other two. It relies on digital equalization as I recall. That could provide a lot of flexibility to deal with room acoustics compared to many alternatives. I recall they are open baffle but use more conventional directional drivers, which might result in a smaller sweet spot for listening compared to omnis.
Decware design is more variable from model to model with their more omni designs it seems. Haven't heard them so cannot compare meaningfully, but I do like the line a lot, especially for products that are designed more around tube amp technology. OHM is not so much nor is Emerald Physics, but your high power hybrid amp would seem to put you in a good place to have options.
Glad you liked "Deadwing". Its still my favorite PT album overall, though FOABP is up there two, though a much harder listen.