Some great advice I'm reading here.
I think if you really want a Magnum and think some future hunts can justify one I would go with the 7mm Remington Magnum. It will easy kill elk or moose,nothing more is needed,and the ammo is much cheaper and easier to find. If you happen to pop into a small town,population 1800,on your big hunt for more ammo,don't expect to find Weatherby ammo.For instance here in northern Canada there are only a few stores that carry it,but you can get 7mm ammo anywhere.
It would be really nice if you could try some shooting with an example of each,that might "seal the deal".
As the allure of hunting big whitetails becomes more and more a passion for many, we are finding that the recent (historically speaking) popularity of hunting deer from a tree stand is becoming the way to do it. I'll make no statement either for or against that technique here. This will be simply an essay on what I feel are some outstanding rifles for tree stand use.
Before we go even one more step, let's all remember that safety is first and foremost for anyone wanting to hunt...