Wow! You guys rock... This is the first post in the forum where I feel some people are making some real educated responses on system upgrades.
I upgraded my 3.5s to Infinitys and left the rest of my system alone because I feel the balance is quite good for a factory system... To get a cleaner system while maintaining balance would cost quite a few bucks, that's why I onlny changed the 3.5s, removed the 7" sub and added a 12" Infinity Perfect. Great sound and good balance, I'm happy.
I will be moving my sub into the spare tire well just to reclaim my passthrough trunk as I feel I'll use that more then I'll use my spare tire....
Thanks guys!!!