couple of good options
Burris FF3 is widely used in the turkey woods and has been for years. Ived used them on 2 guns and have no complaints and they are really tough sights.
Burris FF4 is an upgrade from some of the things the FF3 needed to update. Sight picture is bigger, battery changing is slightly better, more reticle options on it but its also more expensive.
Holosun 407/507. BUILT LIKE A TANK, its more commonly used on sidearms but growing in popularity. smaller sight for those that want a more compact model and it comes with shake awake on it so you dont have to worry about turning it on or off (some like that some hate it). Can get the green dot model, people with astigmatism can benefit from that.
Swampfox Sentinel - more in the mold of the Holosun in that its more commonly used on sidearms but for the price its a fantastic sight
Vortex Venom - Im not a big vortex guy so I personally dont care for them but some really like them. I dont personally care for the button placement on them and the short battery life and they are not cheap
Leupold Delta Point Pro - a little more robust build vs the Burris but double the price. Shake awake technology but this one is slightly different then others. It deactivates after 5mins which is great for battery life, however if you have a bird coming in and you are sitting there STILL the sight can turn off. That means you have to move the gun to make it come back on which IMO isnt ideal.
those are what I recommend personally with the FF3 being the cheapest of that bunch generally and again that sight has been around and used on shotguns for a long while now with a lot of in field testing. I still run that and upgraded one of my others to the FF4. Burris warrenty is fantastic as well. I let a buddy borrow my gun 2 years ago and he litterally dropped it on a rock and shattered the sight. Called burris and they said mail it in, send me a brand new sight 2 weeks later no questions asked.