I did some searching but couldn't find much on this. Has anyone completely upgraded a 2010 stereo system yet? Wiring diagrams? Speaker sizes? Results? How clean is the signal coming from the head unit? Does is require DSP? Has anyone kept the center channel or is it better to abandon it? I'm thinking of a custom 10" stealth box sub since nobody makes one yet and replacing all the speakers up front with real amplification. Thoughts? Thanks!