you could also get just about any receiver you want, and buy the Scosche VW01 wiring harness from
www.sounddomain.com (its actually included free if you order from sounddomain or crutchfield) and a Metra 40-EU10 antenna adapter. no factory modifications at all (you'll have to do some crimping or soldering to the wiring harness adapter), and you can get a headunit that does satellite, mp3, and has a silver face.