If you aren't going to be dialing but using hold overs for distance just about any scope listed will work, regardless I would get a "Christmas tree reticle" like EBR-2c. Diamondback would be what I would run
If dialing for elevation, I would not own a Athlon. When it came to dialing, I've seen more people have issues with repeatability than any other scope on the market. Granted, I haven't shot LR competition in a year and fell of what's "new" in the sport in the last 6 month. Maybe things have chance for them, I'm not totally sure. I have had Nightforce, Vortex and SWFA. I currently have 2 Razor Gen II, Gen I and few PST, NF Atac, SWFA on my 22 trainer. I know these are above your budget but when it comes to dialing, it's all bout repeatability.
If you are zero at 100, with a velocity of 2800fps, with a good bullet at 600 yards your dope will be around 3.7 mils at 60 degrees with a air density of 800ft.