We are remodeling our master bathroom and have selected the Kohler purist sink without the raised portion so it doesn't have the water channels along the outside. We are trying to figure out what length wall mounted faucet to get. We've chosen the Kohler Falling Water and it comes in 6", 8 1/4", 9", 10", and 12". From the wall to the mid-point of the drain hole in the sink is 8". I've seen recommendation to have a minimum of 7", 9", or 12" faucet lengths for this sink. And now I called Kohler and they told me the 8 1/4" one should be fine. Has anyone set this up before, or does anyone know where the faucet and water should fall in the sink? Help?