The scope question: How good will you be at doping the wind and at doping the distance? What will be your target?
If you're good at making estimates of both at long range (I don't see myself as being good with the wind
) then you want a higher-power scope to make those long shots. Otherwise, a 10 or 12 power scope is going to be enough at 200 yds, in my opinion, for ground hog-sized animals. For coyotes a 10 power is probably good at 250 yds'. Some people don't need that much power.....but it doesn't hurt either.
If deer hunting I'd go with a 2-7 or 3-9 X 40 and it'd be plenty for a .223 at reasonable ranges. I don't see a .223 as a deer rifle at 300 yds'. So 7 to 9 power ought to readily do it at the shorter ranges.
Good shooting to you,
SS'