I'd say right now the Packtalk Bold is the leader, but there's still that issue of connecting up with other brands if you want group intercom... can't use mesh in that case. What I'm waiting/hoping for is the adoption of the universal mesh standard that alledgedly is in the works somewhere...... however, both Cardo and Sena want you hooked on their proprietary mesh (for the moment). Most of my riding buddies have Senas, so until we all decide to switch up (translate, spend too much money again), I'm just gonna hang in there.