I was looking into getting a aftermarket CD player to play MP3s. I looked at Best Buy and asked about installation and the guy said that they couldn't do it unless I replaced all of my factory speakers because there is no way to hook up the stock speakers to the new head unit. Is this true?? Can you hook the stock speakers up to a aftermarket head unit? If so, would there be a huge loss in sound quality versus the stock unit?? Any help is GREATLY appreciated!! Incase needed, I planned on getting to head unit found here: http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&rd=1&category=43947&item=2441343755 Thanks again!