I think your decision should start with - what is your range and what is your target. General plainsgame and DG - pretty much everything under 300m and 99% from 20-200 m. For me, I like a 1x for close up and probably 4 x is the absolute minimum. So your choices at1-6 are right on the money. Nightforce do a 1-8 that I would look at. My 30-06 wore a fixed 4x for many years and now has a 4-12. I don't think I have moved it off 4x on a hunt except once when I went to about 6 on an impala at about 275 m and I didn't even take that shot. On the range, a little more magnification is nice. So I think you are right on the money with your magnification choice but might consider a 1-8 depending on your preference. Red dot on the centre of the crosshairs would be my other requirement. For the record, I live in africa, have been hunting and fishing for 30 years, some of it professionally. Magnification is great for targets but less in hunting. I have never seen someone not take a shot because they didn't have enough magnification, but pretty much every hunt I filmed had a case of too much magnification- I can't see or hurriedly changing magnification.