I fall on the side of lower power scopes for coyote rifles. A 3-9 is all you need. I'd rather save weight than have more magnification when it comes to coyotes. Last year I shot a coyote at 500 yds with a variable set on 5X.
Ditto for the 50mm objective...more cost, more weight and not really needed. Go light is my preference for a general purpose rifle. You'll appreciate less weight when the snow gets deep (or you get old, like me).
I do have long-range rifles, and they have the big scopes, but if I only had one coyote rifle I'd have a relatively low-power variable on it.
And don't worry about eye relief on a 204. Not an issue.
triggerpress
www.coyoteschool.blogspot.com