Congrats on the new m&p. I love my 45c as well. I've been racking my brain over what I want on it for sights as well. I wanted to get used to the stock sights for the first five hundred rounds or so until I decided. Think I'll be going with a vtac front and a 10-8 rear. 10-8 makes a pretty decent front fiber optic as well.
Another +1 on the Tru-Glo TFO sights. Just installed mine last weekend after agonizing whether to go FO or Red Dot on my FS 9. Decided to go FO after realizing what I really needed is a CORE to mount the Red Dot. Next pistol will be the 5" CORE 9mm. Can never have to many M&P's. lol
Have a Dawson on a M&P 9Pro, has broken twice, the third FO has lasted 500+ rounds. I suspect the first two were loose, replaced the FO myself, got it right.