I personally have and enjoy shooting the 7mm mag. The ammo is a little more expensive and harder to find in more places than the 30.06. You cant go wrong with either as far as hunting goes. the 7 mag does have more recoil than the 30.06. but the ballistics favor the 7 mag.
Don't think the extra recoil and ammo availability gives any edge to the 7mm vs. the -06. 06 ammo is relatively cheap, easy to find even in the smallest hardware store in Nowheresville, and will take any game in N. America. Ballistic charts really don't show glaring advantages of the 7mm either, but to each his own.
For that matter, the .270 will take even the largest elk. Been there, seen that.