+1 on Gun Dog Supply / Steve.
I've had a number of gundogs, today we have a 6mo Brittany and a 6 yr GWP and they're awesome bird dogs (the Brit shows signs of being the best I've had yet). I've used a variety of e-collars over the past ten years; have a Dogtra collar/beeper combo for one and just acquired DT Systems 2420 for the other. really like these - have used tritronics & innotek before. Of all, I like the DT Systems features the best, including vibe/tone and 'jump' stim. With the right training and introduction, use of the ecollar is just an extension of the checkcord and a valuable training aid.