Hey there everyone. I have a few questions. I am about to invest in two lightbars. The question I have is about KC light bars in particular. I can get my hands on a 1327 Big Bone, 327, or a 338. When I called KC and talked with them they told me to go with the 338, but that may be because it is their most current model. Does anyone know the differences? Also my friend has a 327, but he says it whistles when he drives. Will the 1327 do the same?