Dezmick,
A .270 & a .30-06 is what some call a "perfect pair".
http://www.chuckhawks.com/perfect_pair.htm
IMO a VERY GOOD place to start...............................
However, I now have a "line-up" of
dedicated rifles for the game their intended to take (2 schools of thought).
.............and I still don't own a .270 or a .30-06.