Gunfights are about getting hits. Good triggers make getting hits easier.
The best plastic gun trigger I've shot has been an aluminum FSS in an M&P. They're expensive, but if you want a good trigger in a plastic gun they're the best I've found.
Bluedreaux, is this the trigger you referred to? The Apex Forward Set Sear?
http://www.brownells.com/handgun-pa...ward-set-sear-trigger-kit-prod45404.aspx