I run plastic for a few reasons. I carry a Glock 19 and didn't want to add an external safety to my competition gun. I also use if for 3 gun and like the idea of being able to dump the loaded gun without having to worry about flipping that safety switch up.
Is the trigger as good as a 2011? nope, but with the Zev Fulcrom Ultimate Kit, SJC frame weight, 90 degree Cmore mount with thumbrest, heavy guide rod, 11# spring and Carver 4 port comp, my G17 runs like a dream with 115's for 9mm major USPSA or 100's for 3 gun (around 1450fps).
Will i ever go the 2011 route? who knows, but the Glock runs and doesn't hold me back to this point.