ugh, lots of ideologies here. In a perfect world, I would rock out with multiple subs, custom made fiberglass enclosures, aiming the speakers directly at my face, with sound proofing, gut the factory system, and install a $2,000 head unit, etc.
Unfortunately there are constraints. Money being a big one, its a family hauler not a show car, and many more. So, while I do agree your comments are all VERY valid and correct, I think a step back needs to be taken to better understand the exact situation.
The primary goal is to gain a better sound over factory, keeping everything hidden, and factory look, and within a reasonable budget.
If putting in Infinity Kappa 90csx speakers up front, with the tweeter in the dash factory tweeter location, and the woofer in the door (factory location), using factory speaker outputs into the high input on the processor, applying some EQ, etc, won't gain me ANY advantage than I will just move along and keep factory. If my increase in SQ is modest, than I may just keep factory. If my SQ gain is a decent amount I may continue to do it.
I'm not trying to bash the feedback and ideas, because I really appreciate all the responses and ideas. I just want to make sure we keep things in perspective.
Thanks everyone for your help!!