I have bought a Kenwwod Protalk as all the riders on the Normandy tour had them and in the long run, it is easier to change channels. The Baofeng radios, were less than £15.00 on E Bay and once programmed to the PMR 446 frequency work fine. (Not used for transmitting - Still use my Bike mounted Icom for this).
The question I often get asked is what helmet speakers do you use ?
Well I got rid of the D Type single speakers a long time ago, as they were very uncomfortable, so I found these - Twin stereo speakers, that fit easily into most helmets and found on E Bay for about £6.99 delivered - UK Stock.
They can be either fixed to the lining of the helmet as the come 'Velcro' backed or slid inside the helmet.
The problem I had with these speakers is that they are stereo and the radio, whatever type I use is a mono output. So if plugged directly into a radio, only one of the two speakers work.
Back onto E Bay to search for a Mono to Stereo convertor...