Nimitz-
I own both Leupold and Nikon scopes. Although I do not have a Nikon Buckmaster, I have several Nikon pistol scopes on Contender barrels. For the money, rock solid reputation, clarity, and customer service, I would recommend a Leupold. I have several Vari-X II 3x9x40 and am well pleased. I even have one in silver to match a SS 7mag. Another scope to check into might be a B&L (not Bushnell but true B&L).
As Flatlander said, a good place to buy is a gun show. At least check out the various brands @ the stores before you go the mail-order route. That way you what you at purchasing.
Cris