I am in the process of buying a pair of Garmin Rino 650 radios
Here in Aus they are a 5w UHF Citizens band radio with built in GPS and gps location ability (the units can find each other)
A the moment im using a pair of Kenwood uhf cb radios.
I dont know what the licensing is like where you are
I intend to purchase a set of bone conduction mikes from mckay and associates once the rino units arrive. Mckay and associates (an aussie company) are great to deal with, and produce a quality product
There is a good chance you will need to do the same, most radios dont come with the earpieces.
As for brands, motorola, yaesu, GME and uniden all make good units.
You can either find licence free radios (CB, FRS etc, use the amateur bands (with the appropriate licence, or purchase your own frequency from whoever your equivalent of the Australian Spectrum Mangement Authority is