I don’t have any problem with 50mm objectives. Many aren’t even particularly heavy.
I would not be particularly hesitant with Maven. They don’t make anything. The buy from the same manufacturers as Vortex, Sightron, and NightForce. If they go under, there’s a fair chance of another brand buying their name and taking over the warranty department. If that happens, you’ll probably get a Bushnell in return, but wouldn’t be completely SOL.
NF and Trijicon are tops for non-euro scopes. I like that NF is assembled here. I don’t know if Trijicon is or isn’t.
I like the Leupolds that I’ve owned, and their warranty is still pretty good, although seemingly not what it once was. I never dialed any of them in the field. When I shot competitively, almost no one shot Leupold. The story was that they wouldn’t not track reliably. That was a good while back, and it’s possible that Leupold had fixed the issue. I would not know if they have or have not.