Korbel is by far and away the best brandy on the market. Grand Marnier is a cognac based liquer made with oranges. For a brandy based version you would drink Cointreau. Both can be used in place of triple sec for top shelf margs. or in a snifter on their own.
Here in Wisconsin(where 90% of all brandy is consumed)E&J is considered the PBR of brandies. Here is a recipe for a nice holiday drink:
BRANDY OLD FASHIONED SWEET
2 pitted cherries
1 orange wedge
1 cube or tsp of sugar
3 dashes of bitters
1/2 oz of club soda
2 oz of Korbel
2 oz of ginger ale
Place the cherries,orange wedge,sugar,and bitters in a large tub with the club soda. Muddle the ingredients until cherries are pretty much mush being sure to include the orange peel to release some of the oil.Next add ice cubes then brandy and top with the ginger ale. Stir well enough that the sugar doesn't resettle.
Enjoy,
Jerry