I have a P99c with the QA trigger. I compare it favorably to the best pistol made, the HK P2000(sk). The P99 has great ergonomics, points naturally, is very, very reliable and is simple to maintain. I shoot it as well as the HK. The QA trigger is akin to the Sig DAK and the HK LEM. These are ultra smooth, consistent/ constant pull triggers that are the same each time. That's the whole point. The QA runs at about 8 lbs, resets fast and has a short stroke, hense the name Quick Action. I definitely like the trigger.
My only problm with the pistol has been a few premature slide lock-back occurances that I believe were Thumbs forward grip caused. The quality is high enough for a duty sidearm, the accuracy is good enough for qualifications, the magazine large enough, the grip is adjustable...what's not to like. I suggest you try all three triggers if available to you.
I suggest you eyeball the HK P2000 too, both excellent pistols.