I am getting ready to remove the Mach 460 system out of my 03 Cobra to reduce additional weight. I am planning on picking up an Alpine deck but would like everyone's opinion on speakers. I know all (4) are 5x7/6x8 but I am not sure which speaker would offer the best sound quality driven only by an aftermarket deck. Adding an amp or extra weight would defeat my main purpose. Thank you in advance for your help!