As far as lefty guns go i would say the Ruger, Savage has a really smooth action but they don't do as well with the left handed models. And since the M77 has a 1 in 9 twist, i could shoot a 165gr ballistic tip out of a 24" barrel 600yds easy.
.30-06 is a great choice, target shooting or hunting. What kind of scope are you interested in? In the end, it all comes down to shooter preference.
God made all men, but it was Sam Colt who made them equal.