I used to have a fairly cheapo Cobra radar detector mounted to a prior bike (ST1100). It was about $90, and mounted with an aluminum angle piece with velcro glued to it and another piece of velcro glued to the plastic behind the windscreen. Generally it worked fine for me and saved my ass a number of times. I had a headset speaker in my helmet with a wire and jack connecting to the detector. What I found to be a pain was that the audio feed on my detector, and I suspect most, was a "micro jack", and most headsets for mp3 players use a "mini jack". This required splicing, soldering, etc. Using an adapter was not reliable because the signal cut in and out when you wiggled it. It's really irritating to find that during the last half hour of riding your radar detector signal hasn't been getting to you. I ride with ear plugs on rides of any length, and found that if I cranked the volume all the way up on the radar detector I could hear it well enough through ear plugs. I tried using an mp3 player along with having a radar detector, but couldn't reliably hear the radar detector with tunes playing. Ideally I think you want custom fitted earplugs with built in speakers and the device that gives you multiple audio inputs with a priority for one (the radar detector), so other inputs cut out when that one is activated.