RE: have 30.06 buying 300 win mag worth it?
I'm like several here and feel that the 30-06 will do the trick for most anything and buying a 300 Win Mag won't gain you anything but another rifle.
If I liked a particular caliber like the -06, and just wanted another rifle, I'd be more inclined to buy a Browning BLR or BAR, or a Remington semi-auto or pump action, in that same caliber and leave it with open sights and use it for when hunting in brushy terrain where close fast shots are likely saving the scoped rifle for longer, open range type shots.