Aager,
 
    Shoot a full box of 7 Mags, 175 grains, from a bench, and your love affair with it will be over.
 
    Of the preferences you mentioned, I would go with the .270.   You won't be sorry.
 
    Also, if you really want a nice round, research the .280 Remington.    You will find that it is right up there in power, near the 7 Mag, without the undue recoil and blast.   
 
   Unless you are a pure Elk hunter or Moose hunter, there is no reason to own a 7 Mag.
 
   By the way, if someone lets you hunt on their farm, and they hear that 7 Mag go off, they will never invite you back again.  Incredibly loud cartridge.
 
Best, Mannyrock