If you are going to carry it.... I would switch out several parts and get rid of the Series II BS. Otherwise, leave it alone. I will say that you WILL get a distinct trigger if you get a C&S kit, one that is a step above stock.
FWIW about the Wilson using them on their guns. They were speaking of the 1996A2 which was a "entry" level gun they build a LOOOOOONG time ago. You don't see that stuff in their guns now.