RE: Would you buy a 30-06 and a 338 win mag?
I agree with eldeguello - buy both it you don't already have something in like them in the gun cabinet. Personally I'm not a big 30-06 fan, I would lean more toward a 280 or 270 and 338 but hey...that's me. Buy what makes you happy.
The 338 is a very fine round IF you can shoot it straight assome people have problems handling the recoil.
Also keep in mind thata 338 isn't about flat trajectories, but is does shoot flat enough to get the job done...it's about hitting power and the is a solid step up in power from a 06.