I have an '01 Sierra that is currently all stock. Door speakers are pretty much shot so its getting time for a revamp. I have not purchased anything at this point. I do want to raise the sound up some and was thinking of components in the doors and an extra pair of tweeters in the A pillars. I'm leaning towards an Alpine pdx-5. My main concern is the sound getting to m ears at different times throwing it all off. Suggestions?