I can't decide. I have a CD4000 Eclipse, but I don't know if I should just install it or use my stock CD player (2000 Grand Am) and a LOC. Will the sound quality be significantly affected? I plan on using a cheap 4 channel amp on a cheap Blaupunkt component set and a 12" sealed EQHS in the rear. The main reason for keeping the stock HU is stealth and factory appearance. Thanks.