I use the Dogtra 3502 Super X and the new TriTronics beeper. I also strap a Garmin Astro on my dogs.
But I run Pointers.
Garmin bought TriTronics last year and they have just rolled out a combo e-collar/gps unit that looks promising. Basically it combines the Astro with a TriTronics collar in one unit. If you're into trialing it's worthless (no e-collars allowed) but for a hunting dog, and assuming you have the dough to spend, it's probably worth it for peace of mind all the way around.
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