I never said anything about "this or that is the best", not once. I believe in the same basic fundamentals you do, it seems; no speaker is best, they each have their own application.
I see where you're coming from about the flat piston drivers, but with a "scoop" as I like to call it, there is more air to be moved. The way I like to think of it is like this, how much soup can a dinner plate hold as opposed to a bowl?
I'll have to try to find the article showing distortion differences between oval and coaxial speakers. Wherever it was, they took 2 of the same make/model of speakers, one in 6.5 and one in 6x9 and measured the distortion determining the oval had higher levels of distortion.
From what I've been taught, sound is best reproduced using the fewest number of drivers possible, each with it's own assigned frequency range. Where I'm going with this, I don't know. Another thing I was taught was that as long as you keep the tweeter within a distance that is equal to the size of the woofer, your imaging will stay true (I.E. 5.25" component set; place tweeter no more than 5.25 inches away from woofer).
If I came off as argumentative, I'm sorry, but IMO you came off with the attitude first. The score thing was a joke btw.
Curiosity is striking: who do you install for?