If you're looking for SD/HD lasers and nightsights are worthless IMO. A light, not on steady either, is the only other thing I might even think about aside from my pistol. If I have to draw and fire to protect myself or my wife I won't have time to turn on a laser or acquire a sight picture so standard sights are fine by me.
As it was already said, spend the cash on training and practicing without a light, laser, or night sights. Build muscle memory.