i would go with the 7mm-08, if your going to go with a .30 caliber bullet then get a 30-06, the .308 really has nothing over the 30-06 except maybe a little less recoil.
plus a 7mm bullet is perfect, if i remember right it is a .284 caliber. Thats right in-between a .270, and a .308, and is now arguably the best deer round for under 225 yards.......JMHO....hope this helps