Bottom Paint
I think this depends somewhat on where you live and how you use your boat. In the northern climates where most boats are pulled each fall for winter layup, I would think that an ablative paint would be preffered. But in the more southern waters, for boats that stay in the water year round I prefer a hard bottom paint. My personal favorite is Petit Trinidad. It is expensive, but if taken care of should last you for at least three years. But if pulling the boat every fall, ablative is much easier to sand/recover and for the short season I believe the cheaper paints would be fine. And if your a racer, and every last bit of slick bottom is required, that is another animal, which I am not at all familiar with. Someone else can/will give you some answers concerning the faster bottoms.