You guys who enjoy music on the road could do a lot worse than install the Rumble Road speaker system, available from MH Instruments; I had a set installed on my orignal '02 America and they work great, with either CD or preferably with MP-3 player (more tracks). I think a lot more suitable than in-helmet speakers and totally audible up to and above motorway legal speeds (70mph plus here in the UK). The only thing I have found is dont keep unplugging the MP-3 of CD at the earphone jack socket or they soon wear out!! I remove mine now at the next electrical connection and no probs here the MH instrument link:
http://www.mhinstruments.com/