Re: Sig or M&P
Obviously it comes down to shooter preference, so as said above, shoot both if you possibly can.
That being said, I am not the biggest DA/SA fan in ANYTHING. There are ways to train and overcome that first heavy pull, but for me even after doing hundreds of rounds that first draw from holster and heavy pull felt unnatural and awkward. Even though I loved my Beretta 92, I got rid of it just because of that first crappy pull. Why make a first round hit harder if there is better technology out there? (i.e. an M&P) Even without the APEX kit it beats a first double pull by a lot and guess what, the trigger is the same on the 2nd, 3rd and 4th shots!
Sig guys are just like anyone else, they have their reasons for liking them. I never did, but again, in the end it's what YOU shoot best with and have learned on.