Originally Posted by Big Uncle

It looks like you have longer range rifles and scopes already, so I would pick the 2.5x8 for a model 7. The 2.5x8 is one of the finest hunting scopes that I have ever used. I have that scope on a .375, a .338 WM, a .308 and a .270 and have used them all over North America and a few parts of Africa.
I also have the other two scopes that you mentioned. All three are tough, reliable, and clear. You can't make a wrong choice with any of them.