RE: HAA sights
Depends on which one you're looking at. Last year I got an OL-5000. You can't beat it for ruggedness. All metal, the guard is designed to protect the pin well. It's bright as all git-out. As with any adjustable sight you have to put yardage marks on a tape as you sight in for various distances, but that's all part of the fun. Lifetime guarantee.
Another thing I like about this type of sight is that with the single pin there is less obstruction in the sight picture. You can't pick the wrong pin. There's only one. For hunting I usually set mine for 25 yards a leave it. It's good for anything inside 30 yards. If I happen to get into thicker cover I move it to 20 yards.
If the OL-5000 has one downside it's that it's a bit heavier than most, but that is part of the price to be paid for not having plastic junk on your bow.