Since I don't live in Bear country, from the OP's list, I'd have to go with the .243 and the 7mag.
And if I had to make a choice from the Rifles I currently own, I'd go with my 7x57 and my .264 Win Mag.
I'm rarely in bear country, and it's not grizzly but I don't want to count them out just yet. Maybe one of the kids will decide not to college
