I have an Airtronics mx3s that I have used for bashing and racing for several years. I love it and have never had a problem with it. There only $130 bucks and it's fm with synthesized modulation so there's no crystals to worry about. Also I remember on an old rs4 that I had it glitched like crazy after I replaced all the parts with carbon fiber and aluminum. Upgraded to the radio I have now and no more problems.