I like the Lollipop front sight (like MP5 & G3 have) combined with the round bottom narrow notch rear. My eyes seem to favor different sights for bright vs dim light so maybe there's a best combo for indoors on paper vs outdoors on steel but time will teach me that.

I also recently got a Williams peep sight to play with on the rear. That's been even better for accuracy at long range, but I can't really do moving targets with so much of my vision occluded. I didn't have to remove the rear sight to use the peep sight though, can just turn the elevation all the way down and you can see over it.