I have the SMH5FM, i believe its ONE of the cheapest at around $200
For years i struggled with cheap modified Bluetooth headsets and fitting them into my helmets, all just so i could hear the GPS telling me directions.
The Sena is 1000% better in EVERY way
Seamless connection to Phone and Bluetooth.
Super long lasting battery, (and i can charge it while its in use if needed)
Crystal clear communication.
Able to link up with 4 other riders if need be ( I dont as im mostly on my own)
FM radio, not that i like to listen to the radio when im riding, but its there if i ever want.
And once its set in the helmet i can forget about it as the module just unclips for super easy charging (Can leave it on and charge it if i want too)
And i can call customers easily when i pull over and cant find their address.
All round i love it, wish i had done it sooner.
Mr2u