nolan n-com to 2820

i have just purchased a nolan bluetooth helmet. it now works great but you do
have to download software from garmin to get it to work. i now leave phone in inside pocket, use gps to dial and talk on headset, to answer call just press button on headset, gps tell's me who is calling. and no wires to rip out ever time i get off bike,

Hi Got the Nolan Helmet but as yet not purchased the coms bits.

Looking for a bit of advice on what set up is best to buy and who is the best supplier?