For the money, I think it's hard to beat what Run Chicken offers. I'd likely get the newer solar version though even though no issues with the battery version after several years use. They only flaw I've seen on them is the manual push button under the lip that a raccoon could technically operate - but I've seen people putting guards on that part lately, perhaps the company might change the switch type to accommodate.
I have predators in my area too, we hardly ever see them - but it doesn't mean they don't see your flock while patiently waiting for an opportunity for a tasty meal. Because of that, my auto door only lets ours into a 2nd larger secure run. We used to free-range daily and now I'd never use an auto door for daily free-ranging; that only happens under supervision now.
Lately our main predator has been a bobcat. We've definitely lost a few chickens to them in the past and even have seen them while we're out in the yard too. Pretty sure it's been a bobcat that's killed two of our outdoor cats in the last 6 months. Just last Saturday morning at 6am the chickens woke me up making a ruckus - I go out to the orchard in my chones and don't see anything near the coop...then I see a flicker of a tail moving on the other side of a tree -- it was stalking our remaining cat, who luckily shot off in the other direction when it pounced, then they both saw me and the bobcat took off. On Sunday I scared a female turkey out of our yard, it flew onto the neighbors property and immediately had a coyote chasing after it. Yesterday morning at 6am I hear the chickens going off again...then 30s later I hear a gunshot - my neighbor shot that coyote about 50yds off the property line. Now it's intimate friends with about 15 vultures
Good luck!