Re: new scope
What is your idea of "extended ranges"?
What is your goal?
Boone and Crockett and other holdover reticles are nice, but limited in effective distance they can be used. I figure they are good for 600 yards in general. If that is good enough and you want to keep it simple then I would go with one of these kind of reticles. To learn more and have the ability to extend your ranges, look at target knobs of some kind.
As far as specific scopes, well it kind of depends on how the other questions are answered. Give a little more information about how close and how far your shots might be. If you will be carrying the rifle or pretty much just setting it up for spot and kill.