Garmin/Tri-Tronics, Dogtra, Sport Dog, DT, they all make good collars. I used a couple Dogtra collars with integrated beepers for years without complaints. I moved to a Garmin-Tri-Tronics Pro 550 just for something different last time and it's also been trouble free.

Check out Gun Dog Supply's website. Lots of e-collar videos that explain the features of the various models.