The most deadly i ever was, was when i hunted a rifle with a straight 6X Redfield widefield scope atop my rifle.
The straight 6 was plenty enough power to hunt with, identify the legality or trophy potential,of a stationary but quick to be moving buck, and there was no messing around with the power ring, my guess as to why way more deer don't get killed each year. People see a shooter buck and they unconsciously start messing with the power ring instead of finding a rest and shooting him!
All that said about the excellent qualities of a straight 6x, nothing wrong with a variable either. 3x9, 4x12,... all good, especially when sighting the rifle in and to search for it's best accuracy potential.
I like Leupold and Burris Signature series scopes. There is others that will do you well but don't go too cheap as you will soon be wanting to upgrade. I put most of my money in my binoculars as shooting a buck with a "good quality" scope is easy even early or late, it's finding the one i want to shoot, putting better more expensive glass to use, that's hard to do.
If money is not a concern, there are guys out there that will sell you a way better product than you need. that's my $.02
Joey
"It's all about knowing what your firearms practical limitations are and combining that with your own personal limitations!"