I find absolutely no need for night sights, and it is beyond me why anyone would put them on a pistol that never gets shot at night!
As far as fibre optic sights I can't say they are bulky at all, and they make it very easy to pic up that front sight when drawing from a holster, etc.
It really comes down to what you are using the pistol for. Bullseye or PPC type shooting requires something a little more geared towards accuracy, but for the timed games where you need to be able to pick up the sights very quickly and put them on target fibre optics can't be beat. It takes the 3 dot idea to the next level.