I would boil it down to barrel length and what sort of shots you intend to take.
If you go with a barrel much less than 26",you compromise the 7 Mag.It needs a long runway.The '06 or a .280 will be right with it.I had a 23 in Husky 7 mag.It didn't make much sense.
If you do not plan to shoot at ranges longer than 300 yds,the magnum is unnecessary.
IMO.for many situations,the 22" 30-06 is the more practical choice,But,
If you are playing with over 350 yd shots and carrying a 26 " barrel,the 7mag has a payoff.Is that going to be what you do?
To disagree with an earlier statement,I think the 30-06 is NOT overbore.In a bolt gun,with common powders,100% loading density is practical and safe.The 30-06 is a sweet spot in bore/case ratio.The 7 mag is moderately overbore,the majority of loads not exceeding 80% loading density.
I will concede in loads meant for gas guns,using quicker powders,the '06 may not have full loading density.(80% with 4895)
Unless you are pretty technical in handloading,the '06 will get more loads per case,and will use less powder,your barrel will last longer,premium bullets are less necessary,its not as loud,it will metal foul less,and the rifle holds one more.Usualy, a 7 mag comes with a #4 barrel,and a 30-06 a #3. Lighter.