My favorite is the pro troll(clips) out of cabellas. They are made in Washington State for salmon/steelie rigger fishing in the rivers. The reason I like them so much is that I use a lot of live bait, lip hooked, no sliders. Off the riggers, when I'm down 15-50 feet with 100' lead off the rigger, they will release with the slightest hit on the line, then I can feed line so they get the bait down to their poop shoot, and they do not feel the hook and then its time to cross their eyes! No cling ons ever, and I don't drag a skeleton around for an hour getting chomped to bits by everything in the lake but not tripping the release. They weave on to the cable, above the ball. This also allows me to run my flashers off my ball, which gives the presentation more movement and flash.
I second Adrien on the big R's for my second choice.