Of the three, I'd go with the M&P Core with an Apex (?) trigger and a Burris FastFire red dot (or a better red dot than the Burris, if funds are handy).
My shooting buddy bought the M&P Core, etc. I shot it before and after the trigger change. He used it for Wed. nite competition, where the targets, distances and procedures varied every week; until they banned red dots, lasers and etc. He won regularly. I was impressed, asked if he thought I should get one. "No", was his answer, because I had several better guns (but more expensive), including a Witness Elite at about the same price, at that time.
But, I'll weigh in with the post advocating a 1911. I wasn't a 1911 fan until recently. However, in the past two years I've bought five 1911's and a 2011. They are hard to beat.