Two schools and you have to decide on which one you belong to or plan on owning a lot of guns to find out. Big bore vs. small bore. Some will tell you that big heavy bullets are the way to go while others will tell you smaller calibers that are faster and flatter shooting are the way to go. I am a .270 and .25.06 man myself.
The .270 is the best choice for western big game hunting IMHO.

I would not waste my time with the 7mm I would go with the 7mm MAg. more versitile and probably the best choice for a first time gun owner.
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Liberalism is a mental illness!