For bike to bike conversing, then Sena is an excellent option.
I was able to talk to Wombat over 500 mtrs away, probably closer to 1K. Sena say it wilp work (SMH10) to 500mtrs. The newer ones further than that.
If you need more range, add Senas SR10 coupled to a UHF radio. The hand held work OK, but the Car type even better.,