Sony CDX-M620 , that is what I have , it's a great unit , and with the right installation kit you shouldn't lose any trim , I also have infinity 652i series , they are a direct bolt in to the factory speaker locations , no modifying anything. Here is the url for pics of my car , stereo and mods .
http://www.saturnfans.com/photos/sho...r=5659&thumb=1