Have the 3-15, 3-9, and 6x. The 6x gets used 20x more than the others. Turret rotation has not been an issue for me in the 6 years since I switched over to SWFAs exclusively. That is close to 10k rounds, 80k miles in a vehicle and who knows how many miles strapped to a pack or carried. The reason for the switch was wandering zeros with my other scopes (Leupold and Nikon). The SWFAs are pretty close to bombproof in that regard. The glass is more than adequate for shooting in any legal situation. Put your concerns for glass quality into your other optics that you use to FIND game. It’s really not that important for your rifle scope. It’s an aiming device, so the key thing is repeatability and consistently. The SWFAs have that in spades.
I think the 6x is the best scope out there for 0-600 yard shooting. The 3-9 is a step up in glass, but with added complexity you don’t need. Mine stays on 6x. The 3-15 is a step down from both. The reticle is slightly less visible because the diamond-shaped hash marks are open (not solid black), the extra magnification is frankly not useful for anything short of shooting paper, and the reduced eye relief at the top end makes it even more of a PITA to get on target quickly. People always think they need more magnification based on bench shooting. But on the clock or in actual field shooting and hunting situations neither high magnification nor super low magnification are very beneficial. If you want something now, I would say buy the 3-9. If you are willing to look for a used one or wait for the tariff thing to sort out, get the 6x.