I only read the first page, so forgive me if this is already been covered. The obvious answer is: 257 Roberts. ... Bad knees keeps me out of the mountains plus I live east of the Mississippi River, so no need for the 7 mag. I now shoot a HusqaVarna in the 257 Roberts.
I doubt there is anything east of the Mississippi River that can't be taken with the Roberts. As most of the posters have mentioned, it's almost always about bullets now...and shot placement, as it's always been.