When you say cats can handle the rough stuff and I am talking above 3-4 footers, what length boat are you talking about? I have run with 36' and smaller cats and they tend to run slow in the rougher water and then blow by us in the calm. I have seen the 39' and above run very well in rough water. Would that be about the right size for a true rough water cat? What brands tend to run better in the rough? Different V hulls have better rough water characteristics based on brand. Cigs and Apaches seem to be the brand of choice for V's. My Fountain handles all that I am comfortable throwing at it. Seems to me size matters in V's or Cats when you talk about rough water.