My opinion only,
To me, i think that lasers CAN be useful, but not to me. I like the light, nightsight combo because there is something to be said about blinding the crap out of the badguy at night and still having a bright aiming picture to add on to the top. With a laser im sure that you can tune it or "zero" it to a certain amount of yards that you would normally want the dot on POA. 10-15 yards maybe? I dunno but i know they sell a laser/light combo that would probably be a good choice. Is your gun for self defense/ home defense or is it a just go have fun gun?
All it takes for the triumph of evil, is for good men to do nothing....