Just don't go cheap. I put a 2x BSA on my 44 mag once, and had cracked glass within 6 shots.
I then upgraded to a Bushnell 2-6, and it worked fine. You 500 will have lots of recoil so anyone with a good reputaion for customer service would be my go to.
No offence on this next thing please. If you just dropped that much cash on a new 500 don't cheap out with optics. I can see no reason to buy a $1000+ gun and put a $100 scope on it. Handgun scopes are fairly costly even for a lower end model.
Might also what to check out a holo sight or something similar. A red dot may also fill you needs. Go somewhere that has a lot of options, and check some out.
Me personally I don't like a scoped handgun for a number of reasons. Others love them. Go try a few, and get what you like with the above in mind.
May also want to buy from a BIG retailer as the customer service will typically be better than a small mom and pop shop. If it fails they will typically make it right even if the manufacturer won't.
Burris or better. Those have been know to crack rings so you really need to go with good quality. Burris, Leupold, Aimpont, Sightron, Sawarski. if you call smith they can tell you what to use or what not to use.
So because a person uses iron sights they are inaccurate? I would bet there are a decent amount of people that post on these boards that have killed much farther than 75 yards with iron sights. Save money by not buying a scope, buy some ammo and PRACTICE, and learn to be familiar with your firearm. That is what makes good marksmanship, not just slapping a scope on.
As you know that revolver has a bunch of recoil. So I would avoid a variable scope. A variable just has more working parts to go bad(just an opinion).
I would look seriously at an Aimpoint or some type of red dot sight. They work very well out to 100 yards or farther with no problem. Or look at a Leupold 2X.
I also prefer open sights on my revolvers, but that is a personal issue, not a macho thing.
I do have one revolver with a scope. It is a S&W 44 magnum Stealth Hunter. The revolver has a Leupold Gilmore Red Dot sight and is 1X in power. Groundhogs to 150 yards are inbig trouble with this rig. So a 1X scope is more than enough. Tom.