MJM,
My 835 has killed two low end reticle scopes and one low end red dot scope, thanks to the terrible recoil of 3.5" loads.
I've had an Aimpoint on another 3.5" 12ga. for the last five years now & it has survived nicely.
The benefits of an Aimpoint are:
1. 10,000hr battery life
2. completely waterproof
3. seemingly impervious to heavy recoil
4. the ability to pinpoint the center of your pattern on a specific area. Important when using ultra tight chokes.
5. Being truly parallax free, you can keep your cheek off the comb and not get smacked in the face with recoil.