Drewde, your subs have to be configured as a linear array or they will not project power like your line source speakers. You can position individual subwoofers against the front wall on the floor under the screen at intervals of 4 feet or so. The higher you cross over the closer the subs have to be. 4 feet is perfectly adequate for crosses up to 100 Hz. The subwoofers will be function acoustically as one big driver all the way down to 1 Hz and project power like a line source. You can do the same thing with two towers but they have to be as high as your ceiling, and they take up vertical space possibly interfering with the screen. I do not like screens in front of speakers. If you look at my system page you will get the idea. If you want to lean more about subwoofers feel free to message me. I have been using line source speakers since 1980.
As far as processors go I would go with the Trinnov over StormAudio. I think their Room control is better. I am strictly two channel so I would go with the Amethyst but they have theater processors up to 32 channels. It is interesting that both companies are French. How you use the room control is different for theater than 2 channel. Some people never actually sit in a specific spot to listen, music is for the background only. If you do sit in the listening position and listen seriously you can usually store a profile for strict two channel use and switch back and forth.
As far as processors go I would go with the Trinnov over StormAudio. I think their Room control is better. I am strictly two channel so I would go with the Amethyst but they have theater processors up to 32 channels. It is interesting that both companies are French. How you use the room control is different for theater than 2 channel. Some people never actually sit in a specific spot to listen, music is for the background only. If you do sit in the listening position and listen seriously you can usually store a profile for strict two channel use and switch back and forth.