Hi. I have decided to install the Polk sr 6500 in the doors of my civic, and plan to mount the tweeters on the pillars. Need your advice on: 1. Do i just install like stock or do i need to install in some other way to gain better sq from the speakers? 2. I plan on using mtx 4500 sub in infinite baffle at the rear, with the new mtx amp driving both front and rear setup, is this a good choice or should i get a bigger or different sub or amp? 3. Ill be using the kenwood dnx 8120, would it work well for music without the rear fill?