Door Speakers!!

[Jebus]

I'd also say dont bother with 6x9s. Splits and a sub will sound a heap better, and easier to find places for and mount. The sub in a box which for me fits to the side of the spare wheel mold in the rear nicely facing the back of the car. Once you have a sub, there is no need for the 6x9s design, you dont need there horribly weak bass or battered high frequencies, splits will give you better sound quality.