Nice score. Once you get those thing tuned you will never go back to conventional speakers again. The dynamics are scary.
I have the USD Audio horns in my set-up. My midbasses are on the floor in enclosures. Consider this set-up for your system.
If you get the Audiocontrol (which I will be getting soon enough), get the digital one so you can save all the maps. This way you can try out all sorts of settings until you get the one you want without having to have a photographic memory.
I think though, the supplied crossover should get you pretty good music as it stands. I believe the network contains some decent compensation, albeit, not optimized for your car.
Oh, and don't put more than 50 or so watts to the horns. They are EXTREMELY efficient.