I use FM. I'm soon to upgrade to 2.4 ghz spread spectrum which is even better than FM. The clarity you get of a signal with FM is why FM is the popular choice... well it used to be anyways. Since 2.4 ghz radios came out, FM radio demands have dropped and so have the prices. Mine is synthensized, meaning I can change channels by clicking a button on my radio, and turning a dial on my receiver... never again will I need a crystal.