For those of you that have replaced your Nakmichi head units, do you think it was worth it to splice everything? Or just abandon the wiring harness and install all new speakers, etc? I suck at electrical, and I can't find a shop in my area of So Cal that is willing to splice the wiring harness. Is it easier just to install new speakers and a head unit? I don't need awesome sound, just want the convince of blue tooth and satellite radio. A backup camera would be nice also.