After digging for a while and writing off a dozen other drivers I'm going with a set of 8 JL audio 6W3v3's. Power will be via a pair of kicker zx550.2's. Box(es) are still partially up in the air, but a quick guess would be one per front door, 2 in center console, 4 in front partition of rear cabin.
The high pass crossover for the midbass will be on/off depending if I'm feeling like running the 15's. I'm aiming at 80 - 100hz for a starting point. The area between 60 and 100 hz gives almost exactly identical phase response and group delay for the 2 systems, so I should be able to get away without time correction being a must.

Low pass point will completely depend on how these sound at higher frequencies and how the components fare out front and rear.

 

I've got a feeling that with so many drivers dispersed throughout your car/truck, it's going to cause problems. Cancellation is going to be a big problem I think.

Could be wrong, and I hope I am for your sake...

 

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