I was asking this same question not long ago and ended going with the M&P. The trigger can be done to be light with a short reset and break at the rear of the travel so there is not much overtravel. I don't think you can get as much of the pre-travel out as you can with the XDM. Overall I prefer the M&P but I feel the trigger can be made to be better on the XDM or at least the ones I have tried. For clarity, I am speaking of guns that have been sent out to smiths for the work. I hope this is helpful