Question: Which brand of Mascarpone Cheese should I use?

500 gr of mascarpone cheese
4 eggs
7 tablespoons of sugar
bitter chocolate chips
cocoa powder
coffe (about 5 espresso size cups) + 1 spoon of marsala wine
finger buiscuits (1 packet)

Beat the whites until firm. Mix mascarpone, sugar, yolks and then gradually incorporate the whites. When the mix becomes creamy, add the chocolate chips (should be bitter to contrast with the sweetness of the cream) and pour a thin layer on the serving bowl. Quickly soak the buiscuits in the coffe (mixed with marsala) and layer them on, adding some more cream on top. Depending on how big the serving dish is, you may be able to make 2 layers of buiscuits; in any case, remember to finish always with a layer of cream on top which you will sprinkle with cocoa powder. You can make tiramisu a few days before your dinner party and freeze it. In this case it is advisable to top it with cocoa powder only once it's defrosted.

I tried this recipe and it tastes great but now I want it to taste authentic. I think that since I am in USA, I may not be using the correct Cheese or Wine. Please give me the correct instructions for USA so that I can make my Tiramisu authentic.