Haven't tried a Laser yet. Too much of a tight wad. I have switched the front sight of my M&P to a red Fibre Optic type and realy like it. It jumps right out at me in strong light and is as good as standard in darker conditions. Might go to a Night site but as indicated I am a tight wad.
I simply don't attempt to focus on and line up front, rear and target anymore except when using sandbags to set sights or run accuracy checks. Even then I have to squint and focus best I can on one at a time with the sights being blurry. Using that approach I can still on occasion get sub 1" groups at 15 yds.
I have found that the front sight is the important item when shooting combat mode, even at 15 or 20 yards. At 5 yards sights are not necessary for mansize targets.
I feel if I can tell the target is a valid aiming point at night I can point and hit at distances required within my house.
That doesn't help you select a laser but thought it might give you some food for thought.