I would reccomend Tri-Tronics collars. They have a great warrenty and customer service. I have had zero problems with the ones I have owned. If you are going to be a one dog owner I would look at the Sport Series, they start @ #50 and go up from there depending on what bells and whistles you want on them as well as range. The Sport Series is easy to clip on your vest or wear around your neck.