Check this out - my local shop put together a system plan for me, I think it only consists of two door speakers, two tweeters and one sub. Supposedly this outfit is recognized as the car audio leader in the NW. let me know what you think, I'm seriously considering it. Here's the component list they first recommended after I told the what I was thinking.
Mosconi of Italy 4to6 DSP processor (parametric EQ, crossover, time correction, and digital level matching)
Morel Virtus 6 165mm midwoofer (2-inch voice coil, 3-year warranty, installed in our precision mating spacers)
Morel MT-120 28mm silk-dome tweeter (low frequency capability, fabricated into the window "sail" trims for on-axis performance and the widest stereo stage)
Arc Audio Mini KS125.4 (mids and tweeter channels) and Arc KS500.1 (subwoofer channel) amplifiers
JL Audio 12TW3 thin-frame subwoofer (Made in USA, excellent small-enclosure performance)
I'm kinda scared to say how much it costs to install - can you guess?