Sounds like a cool idea. I think you can achieve a nice soundstage without adding the tweeter in the pillars though.
And if you want a high soundstage why not just install one set of tweeters and put them in the a-pillars? Anyway, I have heard many great things about those two tweeters on this website.
I currently have the W12s installed in kicks with a set of Hiquphons and I am very happy with the setup. I like your speaker choices but just not sure if I would do it the same way. Good luck to you!!
And if you want a high soundstage why not just install one set of tweeters and put them in the a-pillars? Anyway, I have heard many great things about those two tweeters on this website.
I currently have the W12s installed in kicks with a set of Hiquphons and I am very happy with the setup. I like your speaker choices but just not sure if I would do it the same way. Good luck to you!!