Prep: Heat the oven to 350°F. Wrap the outside of the springform pan in two layers of heavy-duty foil. Boil a kettle of water.
Crust: Mix the graham crumbs, sugar, salt, and melted butter. Press firmly into the bottom and 1 inch up the sides of the pan. Bake 10 minutes, then cool. Lower the oven to 325°F.
Cream cheese: Beat the cream cheese on medium-low until completely smooth, about 3 minutes. Scrape the bowl.
Sugar and flour: Beat in the sugar and flour on low until smooth.
Creamy ingredients: Mix in the sour cream, heavy cream, vanilla bean seeds, vanilla extract, lemon juice, and salt on low.
Eggs: Add the eggs one at a time on low, mixing just until combined.
Water bath: Pour the filling over the crust and tap out air bubbles. Set the pan in the roasting pan and add hot water halfway up the sides.
Bake: Bake at 325°F for 70 to 80 minutes, until the edges are set and the center 2 to 3 inches jiggles slightly.
Cool: Turn off the oven, crack the door, and leave the cheesecake inside 1 hour. Remove from the water bath, loosen the edges with a knife, and cool to room temperature.
Chill: Refrigerate at least 8 hours or overnight. Slice with a hot, dry knife and add toppings just before serving.