30-06 the way to go? Why not 308?
The only advantage between the two (as explained to me by my Dad) is that the .308 is a short action (stiffer) while the .30-06 is a long action (less stiff). This is coming from a guy that is a life long hunter and at the same time a bench rest guy.
In the practical world of a $300 bolt action, I can't see action stiffness making any difference. Although when us gun folks buy up every single available round of ammunition (think 2012-2013), .30-06 will be easier to find than .308.
And for what it's worth, .30-06 is a more capable round. That assumes you reload and are willing to work up your own data. I don't think you'll see a huge difference in the published loading data. Some difference, but not a huge difference. As in, not keeping a bullet supersonic past 800 yards difference.