I have a millett zoom dot, which is just a red dot, but of aimpoint quality - 300' waterproof, shock proof to .500 S&W, etc.. it's a tough sight, but expensive. I can dial down the dot size to 1 moa which i'd say is good for shooting out to 150 yard, maybe 200 yards if you practice enough and have a good steady rest. Or you can dial it up to the biggest dot size which is 10 moa, which is good for 50 yards or less. Battery life is like 1,000-10,000 hours, and i got a GG&G aimpoint ring of standard height which has a spare battery compartment on the side of it. I was also looking at an aimpoint compc3 or compm3 in 2moa.
I would look into something in the 1-4x power if I were you. NIkon Monarch African is a good one, Leupold make some good ones. I would definately wants something that can be adjusted down to 1x in case you need to make a snap shot in a dangerous game scenario or at less than 100 yards. They make scopes nowadays that have an illuminated crosshair. Scout scopes are good too but field of view tends to be small, though i've never tried one so i don't know.