Go with a single pin and don't look back. The sight picture is better and you can never use the wrong pin. Now I know what you are thinking, "I could still use the wrong yardage." I challenge that viewpoint with this. Where do you hunt? Tree stand or ground blind? Timber or open field? Most bows of today shoot relatively fast to very fast and most archery shots are under 30 yards. I leave mine set at 25 yards when hunting from a tree. I shoot roughly 280fps and will be a couple inches high at 20 yards and a couple inches low at 30. If the deer is really close, I can make the quick adjustment for it. If the deer is much over 30 yards, I would rather use my range finder, get the correct yardage and shoot using the correct yardage vs. holding high or low with a pin set at 40 or 50 yards. I can make this adjustment in a matter of a couple seconds and still shoot. If you feel like the 2-3 seconds you take to make that adjustment might cost you a shot, it's probably not a shot you should be taking anyway.
If you need the pin to shoot farther, say 50-80 yards on a spot and stalk, aren't you checking the range anyway? Or do you just eyeball and say 60 yards, use your 60 pin and miss because you misjudged the yardage? My point being that most people will use a range finder to get that yardage for a longer shot. And it really don't take long to spin the wheel to the yardage you need and still get your shot.
But really, think about how and where you hunt. For me personally, I switched to a single pin 3 years ago and will never go back to a multi pin sight.
I use the HHA king Pin on my 3d bow and the HHA Optimizer on my hunting bow. Absolutely love both sights. My only complaint is the pin gets tough to see the last few minutes of light when sitting in a ground blind. Other than that, they are very easy to set up, sight in and hold there zero very well.
