I use an autocom which works extremely well for rider to pillion communication using the included speaker and mic sets. It is more expensive than your price range, but in my opinion is probably worth it. The speaker sets install into your helmet with adhesive tape and velcro. The autocom and other units like it (starcom, a few others) typically have a pre-amp built in that overcomes the problem parapanfan talks about. Also, it has built in "vox" control that damps ambient sound when a mic is activated by talking into it. As well, I plug my ipod in and have a bluetooth receiver for my tomtom rider satnav and mobile phone, all controlled through the autocom main unit. Finally, I have a set of kenwood 2 way radios for bike to bike communication (mainly for when my wife rides her own bike), which also work through the autocom main unit. Depending on what you really want a comm setup for, I'd guess you get what you pay for... Good luck!