If your looking for the cheapest go with an rf. but for the money and clarity i went with and aux input from Crutchfield: LCD TV, Car Audio, Home Theater, Speakers, Plasma TV ran about $70 but i hate the static you get with most all rf adapters and the fact they have to be like right by the radio and out in the open. With the aux input adpt its all hidden away and the connection is in my center console so no one ever knows it there.