When it comes to bullet choice, it depends on the intended game and the range at which you intend to engage the target.
For whitetails, if you're going to be shooting 600 yards and closer, bullet weight doesn't matter much. At short distances, speed trumps BC. But when the distances get long (beyond 600) the heavy bullets really begin to shine. My suggestion is to look at the Berger 180hybrid. It has a great BC, you will be able to get good velocities with it and it's lethal.