Re: Rear fill to Front speaker ratio.....(long)
Forget rear fill. Like others have said, it is fill.
Your sound stage should come from the front, just like a good 2-channel home stereo. Imaging should be at eye level and the stage should be wide, extending beyond the a-pillars. A good pair of fronts can handle anywhere from 100-200+ watts RMS, which is all you really need. Sure you can pour more to them for extra headroom, and if you setup the system properly you won't have any problem with "over powering" your front speakers (again, if you choose a solid front set). The past two car's I've had used a 3-way and then a 2-way component set up front. The 3-way had about 200 watts x channel, and the 2-way (Adire Koda's) had about 300 watts x channel.
If you want proper imaging, forget about rear-fill.
PS: your code is wrong. the begining of the break is a simple "<br>" and the end of the break should have the / come before the br, so it looks like this "</br>"
...but you don't need that when posting on this board. Just hit the "Enter" button.
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Power handling is not a power requirement! Don't install suckage!