ksuchewie... Welcome. I too replaced SIGs with M&Ps. A P229-DAK with an M&P40 and a P239-DAK with an M&P40c. I haven't regretted it for a moment, although I sure wish Truglo made TFO sights for M&Ps.
By-the-way, you can buy finger grip extensions separately, and convert the supplied magazine without one if you like.
Thanks for all the welcomes. Gladd to see people are nice here unlike another forum that I've been lurking.
Where would be a good place to find those mag plates and those novak sites?
I have a feeling I may have a couple more M&P's in the future. I'm happy that I didn't purchase the other brand I was looking at.