My Alfredo sauce recipe is virtually identical to yours except that I add about 4 oz. of cream cheese to the sauce as well. I have substituted with different combinations of cheeses and they all come out excellent. I am sure it is due to all the cream and butter in the recipe!
My family insists that I make this or a variation of it about once a month. I also have to make a double batch of the sauce, since I have a family of 5 large eaters that want leftovers to take for lunch the next day.
For a variety I have added cooked cubed chicken or ham, mushrooms, and various vegetables to the final pasta dish. This sauce is also very good served as a cream sauce with sauteed mushrooms added and served over a bed of rice that I have topped with a cooked chicken breast! to make the presentation even prettier I usually sprinkle the top with a few chooped chives, fresh parsley, or green onions.
Both Alfredo recipes sound good. My wife’s favorite meal for me to cook for her on special occasions is a homemade Alfredo and pasta dish with grilled Mahi Mahi. She has also requested variations with grilled chicken breast pieces.