I am looking to install 12 speakers and need some guidance as to the best and most efficient way possible. I have 4 Quantum 6x9's rated at 80w RMS each, 4 Quantum 6.5's rated at 60w RMS each, and 4 Polk 4's rated at 45 RMS each. The 4 6x9's are going to be in the rear deck and there will be a...