If you want an easy drop-in replacement speaker without having to modify the door panel or use an apadter bracket - than the Infinity Reference Series 6810cs are great for use with the factory radio. The highs are crisp, clean and bright without being 'tinny' and the mid bass response is good as well. i would recommend this over any other 5x7 on the market. You can pick them up at local retail for about $100, or cheaper on ebay.