IMO Wilson Combat offers some pretty nice sights for the M&Ps.

Not a big fan of 3-dot sights, I prefer a gold dot front / black serrated rear. These are some high quality sights with lots of options. Been procrastinating on a set of Tritium .165 front / single dot Tritium rear on my 40c. Kind of a straight eight sight picture. Maybe with the Trijicon HD XR up front...