In all seriousness, I've never changed out a trigger in anything. It's always been a matter of learning that weapons quirks and flaws. The only trigger I've even installed was in the lower for my AR, and that was donated to my build by a friend as he upgraded to a Timmony trigger. I see the price tags on some of these triggers, and can't see how it could be worth the money.
This might sound like sacrilege, but to me, a trigger is just a trigger.
You are a better man than me. A bad trigger drives me nuts!!!!! Although, if you are a spray and pray shooter, any trigger will work. For precision type shooting, a good upgraded trigger will really make a difference. If you don't believe me, ask the top 5-10 shooters in the black rifle challenge here, what kind of trigger they use. I bet most (if not all) will be using a matchgrade trigger of some type.