RE: 3-Pin or 5-Pin Sight?
Well, I have mixed emotions on this one. Personally, I say the more the better. Even if you DON'T shoot a deer at 50 or 60 yards, it's good to practice from that distance. You can't practice from there if you only have 3 pins.
That being said, I am personally not a fan of multiple pin sights. For me, the pin gap is so small that when I try to aim, my peep is so full of pins it's not only confusing but just downright hard to pick the right one out. That's why I go with a single pin slider. I get all my yardages from 20 out to 70 and only need one pin, no clutter in my peep.