I'd recommend buying the one that Vampyre listed, I'm currently running one at about 600 FPS and it's working just fine. The sears are good quality, I can't imagine a circumstance in which they would fail on you. I really hate zero triggers, I don't trust them, hate the lack of a safety (for functional and aesthetic purposes), and find the pull to be stupidly light. At my current setup, the pull is perfect, not too light, but nothing too hard.