I've got an Aimpoint H-2 w/a Eotech 3x mag behind it on one of my HK 762's. I got Eotech EXSP-2 or whatever the hell it's called on one of my shotguns. All were expensive and I got 'em years ago.
But then again there's the tried and true cliche... "how much is your life worth"
The Aimpoint I can leave on 4 yrs. though I change my battery once a year and both it and the Eotech mag are tanks that seem like they're going to go on forever.
Some folks call the Eotech EXSP-2 an antique, it might be, and you have to keep changing the battery, and U have to take the time to turn it on, but mine's paid for, has never quit, and what's great about it is very intuitive w/the "circle of death", AND the fact that if U practice enough w/it, it can quit and U can still shoot accurately, I know because I practice shooting w/it off.
To be honest, I think there's gear that's come up that's I'd consider getting that'd be a different choice than what've I now got.
I'm just not willing to hedge on dependability for the sake of saving my life, which is the bottom line.
What I've been considering (but not definite about it yet) is the Primary Arms RDS w/the etched ACSS reticle (shake and awake if I remember correctly), so if the thing goes out U can still use the etched reticle for a great deal less money than I paid for the Aimpoint and Eotech gear.
And I might also talk myself into getting another Eotech w/a green laser for one of my other shotguns. Yeah, short battery, but U don't have to look for the "dot" which can on occasion get lost in the background.
They've got some great new RDS w/extended battery life and/or w/the shake awake feature, U pick up UR long gun, and it "goes on".
Good luck.and WELCOME