I would pick the model with 6' cord and isolator. Left center in shot. I just wish that piece had a 90 degree end, like that patch cord on the bottom right. The oem Honda one is way short, and if you want to use device on handlebar, you'd have the further expense of a patch cord.
BTW, I see that EC piece is quite a bit higher that the 35.00 it used to be. 4: