Microwave morsels in medium, microwave-safe bowl on medium-high power for 1 minute; stir. Microwave at additional 10-20 second intervals, stirring until smooth. Cool to room temperature.
Beat melted chocolate, cream cheese, and vanilla extract in large mixer bowl until light in color. Fold in whipped cream . Spoon into crust. Refrigerate until firm. Top with sweetened whipped cream, chocolate curls, and nuts.