Definitely aftermarket stock panels. Tons of others are available if you decide you don't like them. Like friend jsbethel, I prefer darker color grips on my stainless guns, but that's why they come in different colors; you can get what you want. My original wood grips already had a few minor scrapes and dents, so they just stayed in place.
One important caveat. That screw that holds on the right side safety lever sometimes will develop an annoying tendency to loosen and eventually fall out, allowing the lever to fall off and get lost. On the slide I have with that style ambi safety I had to develop the habit of checking it fairly often until I finally put a drop of nail polish on the threads and solved the problem.
Froggie