ok i read the faq and i see this talk about a bypass harness, and then i see someone mentioning not using the built-in amp in the new head unit. so my question is this: if i go buy a new pioneer cd player (for example) to replace my factory head unit, am i going to use the pioneer amp, or the silver amp behind my glovebox? it seems to me that the silver one would be better as its bigger and would probably dissipate heat more efficiently. i dont want an aftermarket amp or subs but i am considering getting aftermarket speakers in the doors. i dont care about the complexity of the wiring, soldering is easy and im not going to revert back to the factory setup, just wondering if i should keep the factory amp or not.