For this dish, I absolutely adore linguine noodles. They're the perfect thickness and don't dominate over the shrimp, which is the real star of this meal. If you simply can't imagine Alfredo sauce without fettuccini noodles (because that's a match made in heaven) then by all means, use them! You can use just about any type of pasta: spaghetti, penne, tortellini, angel hair, ravioli.