I'm almost completely satisfied with my MP3's sound system, only thing it needs is a 4 channel amp to power the door and rear deck speakers. I'm not sure how much the Excelon amp costs, but for show purposes, I'll probably buy an Excelon amp. Not like they suck either. What's your guys take. I figure if I throw in the amp and turn off the deck internal amp, it'll clean up the signal being sent to the amp thus give you cleaner, more crisp sound.