Since you already have a .270 which will do most anything the 7mm Mags, .30-06, or .300 Mags will do inside 300 yards (which is pretty darned far in reality), I'd say get a .45-70 or .450 Marlin for a change. Then you'll have a med-long range deer rifle and a short-med range "kill anything that walks" rifle. That will limit redundancy in your collection. My two cents.