I went down the Scala Rider route because the kit comes with a boom microphone, (I guess others do too though), that clipped directly in to a designed recess within my Cabery Tourmax (flip front) helmet.

Plus the Scala had a very easy to use two button operation, great for gloved hands. Also the twin speakers have multiple fitting options and the sound is fantastic. I'm not a fan of listening to music whilst riding but the system does have Bluetooth and will take your music collection from your phone/pod which goes to background when someone talks.

One thing I found was some people complained that their new comms unit would sync in to their sat navs. TomTom have recognised this and have a web page stating which unit is compatible with what comms kit.

Check that 1st..I bought my Scala because I'd just spend hundreds on a new TomTom and it would have been a PITA if they didn't work together.

__________________
I have a lot of growing up to do. I realized that the other day inside my fort.