I've tried scopes at just about all different budgets for dedicated long range shooting and came to the conclusion that only a rich man can afford cheaper glass and cheaper mechanicals. Plenty of people rave about the Sightron Siii but honestly, when I tried one, I just didn't get the hype as I found the glass quite poor even in comparison with my DMR. The least expensive scope that I've found more than acceptable at longer range is the bushnell DMR series...just about one of the most reliable and best optics imho at its price point but I also liked the newer Gen 2 Vortex PST scopes for similar money. The further out you go, the more mechanical precision, repeatability and reliability matters as much as optical resolution and clarity. I went through scopes from around £400 up to £2400 and no surprises for guessing that the top tier ones comprehensively wiped the floor imho with cheaper scopes, and that includes deltas (which optically are ok, not top tier, but ok).
I ended up with a shortlist of six scopes including the Khales 624i, the S&B PMII (double turn), The vortex Razor Gen 2, IOR Cruisader, Steiner MX5i and Nightforce Beast.
Of those, my favourite optically were the PM2 and the Vortex but I opted for the PM2, although the Khales was pretty good too. It's proven reliable and rugged in theatre which provides reassurance that for civvy street it'll be more than solid enough, and I liked the simplicity of the zero-stop and ease of use plus preferred the rets to the Vortex. I didn't like the Cruisader. Big and chunky but the ret imho was way too thick for LR precision work and it had an odd colour cast. There were also plenty of reports of unreliability at the time, and that cloud still hangs over them. The Nightforce I couldn't see for a decent price and I had already discounted March top tier scopes because I felt the PM2 offered everything needed for less money. I also bought, then sent back the tactical Steiner MX5i Military LR scope. It was truly awful at the price with terrible chromatic abberation which conveniently not one review on it picked up on (the trouble with paid reviews

) Perhaps a duff one? Nope, as I got the importer to check others in that batch and they all had it, Batch issue? Perhaps but my money wasn't going there.
I think a lot boils down to personal preference at this level, a lot depends on what suits you. There's a reason that the PM2 has been so popular for so long, and I wasn't put off by the nonsense forum talk about it tunnelling at low mag since it's not used at under 10x...ever, by me or 99% of users who buy the 5-25 x 56. That was a few years back and I don't regret my decision. It's been a fabulous scope for that purpose.