Cary has an excellent point. The shape of a lever-action may dictate a scope with longer eye relief than you would need with a rifle stock shaped differently.
For the original poster, my favorite scope for a rifle such as a lever-action is the Leupold VXII - 2-7. It is the lightest 2-7 in the industry. That light weight is really important in that you have to be careful not to let the scope "over balance" the rifle. Both the Marlin 336 and the Winchester '94 are easily over balanced by large/heavy scopes.