I highly recommend getting the system from EAS, I did and could not be happier. I had it professionally installed and it works great. I also purchased the DVD/TV tuner and then bought two sets of antennas from another source, one is mounted in the front at the top of the windshield and one in the rear at the top of the rear window. They are really nice and are almost completely hidden and work surprisingly good. I also had my installer add a three way switch which in the ash tray area that uses the AUX input from the radio. One goes to the DVD/TV tuner, one to the normal aux input mounted in the glove box by my BMW dealership and the last is for my video ipod which also has a video feed through the DVD/tuner so I can watch and listen to music and videos. Really a slick system.