OP, I'd highly recommend you start with a Vortex PST II 5-25x50, I have one and it is a fantastic optic for it's price and would be good to get you started in that range (the 5-25ish) range while not breaking the bank but being a good solid scope. I have had the DMR II and it is a good scope but optically I think the PST II edges it out just slightly. Also, one thing to consider for your type of shooting is the FOV at the short end of the magnification range, you might think the DMR II at 3.5x has a huge advantage over the PST II at 5x, but the differences aren't huge as the DMR II is pretty poor at 3.5x with only 25.3' at 100y while the PST II at 5x gets 24.1' @ 100y, in fact, the PST II has one of the widest FOV's of any 5-25 out there.
Also, I would not recommend the DMR II for anything close up as it can only focus/parallax down to 75 yards (the PST II can go down to 25y), anything closer gets pretty blurry real quick. Finally, while I like the G3 reticle I think the EBR-2C reticle is a bit better because the Christmas Tree portion is not as intrusive as the G3 with its dots instead of solid lines.
One final thought, I have purchased from Experticity before myself; however, I would highly recommend giving the Hide Dealers a chance, they can sometimes beat mil/leo pricing with some of the deals they get from the manufacturers so it's worth giving them a call and telling them you're a Snipers Hide member. I'd recommend Mike or Richard at CS Tactical, Jason at Eurooptic, Mike at Mile High Shooting, Doug from Cameralandny is also a great guy to work with and I've also heard good things from Sport Optics but don't have experience purchasing from them.
PS - my first 7 was a 7 WSM that I bought just over 5 years ago but I sold it because it weighed a ton and I couldn't see myself hucking around the Rocky Mountains when hunting, I currently have a Chanlynn built 7mm SAUM that I love. To me, the 7mm short mags are absolutely ideal for big game hunting/long range as they have superb ballistics and pack a lot of punch with the heavy 175 bullets like the Hornady ELD-X 175gr; however, I noticed in your game lineup you didn't list Elk which is primarily what my 7mm SAUM is for, for anything smaller the 6.5 Creedmoor is more than capable ballistically and energy wise, heck, the 6.5 CM is also a very capable elk cartridge as well.
(One the Left: Chanlynn 7mm SAUM with Bighorn TL2 short action, Chanlynn 26" custom Medium Palma Contour barrel, Manners EH1 stock, ARC M10 low rings and Minox ZP5 5-25x56 scope. On the Right: SAC 6.5 Creedmoor with trued Winchester short action, PROOF 24" Sendero contour barrel, Manners EH1 stock, ARC M10 low rings and Vortex Razor HD AMG 6-24x50 scope.)
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