I just picked up a g20 (10mm) to use for a woods gun. I'd like to replace the factory plastic sights with something a little more sturdy, and holy cow there are a lot of choices. I'd like the sights to offer quick acquisition in case I have to use the gun for bear defense, and also be accurate enough to use for hunting out to 50 yards or so. Night sights are not needed fo my intended use. What have you used with good results?