I have been using with good success the zx1. It has started to give me problems. I have resisted the H10 models in the past mostly due to they were cumbersome, needed to be plugged in and seemed expensive. But I am looking to take the leep and purchase the battery operated H10pm. I found this place on line that seems to have the best price for it. Is anyone faimiliar with this site or know of a better one? Or is the supply house the way to go even though its more expensive? Thanks!