So I have Excellent sound quality at this point.

The kenwood, pyle subs, infinity speaker upgrade, and caps. Now, I am ready to take it to the next level.

My plan....

2 more 6.5 inch infiniti speakers for the Sub location. tweets and woofs.

1 (4)channel amp to live where the stock amp lives now.

AudiobahnŽ AMA12004H - Murdered-Out Series Class AB 4-Channel 1200W Amplifier

1 box style sub (space saver style).
PyleŽ PLBASS10 - 10" Low-Profile Super Slim Active Amplified 1000W Subwoofer System

All new wiring from Amps to speakers.

Anyone know if the amp will fit in place?

I expect more sound from the back of the car. I have great sound up front but I feel like I am missing music, sound, surround effects by not having speakers behind me other than the subs. So more sound, more power, and dedicated 4 channel power.

Any sugguestions? I always like to bounce my ideas off the forum before I start spending $