Comms, Radios, and Headsets

Hello fellow snipers, i have been playing airsoft for a long time now but in more recent days i have noticed i need a good radio and headset. there is a similar thread posted about this specifically for head sets but i would like to know the overall of what to get. If you could list a few companies and model numbers for radios and headsets (microphones and earpieces) i would really appreciate it also if you could tell me what the best one ear head sets are because having a both ears covered is not the best for sniping.