As to the scopes, the .243 has a 4x and the '06 has a variable that currently does 2-4. My plan is to use them primarily when shots will be 100-200 yards with 200 being close to my limit. What sort of variable should I be looking at? All for reasonably big game but generally on the smaller size like deer, sheep, goats, pronghorn. The only real biggie I want is a bison and even then I would look for like a yearling. But, that would be close-in shooting . Thanks in advance.

Also, when I shop for a scope where should I go for the best advice/counsel?