The PM9 is much smaller than any XD or Glock. It WILL kick hard with hot +P ammo.
PM9 in hand
PM9 next to subcompact Glock 27
The only thing i don't like about the PM9 is the lack of an external hammer or protruding striker. Beyond that, the LCI/manual safety model PM9 is, to me, the ultimate CCW 9mm ever made.
I agree about shooting as many models as you can.