@Dano sorry man you have have to explain how you are going to strip hundreds and hundreds of pounds out of a boat to achieve better performance and price advantages? I know that @DW did it but I don't think his carbon fiber adds are going to be cheap.
You still need a 19-20' fiberglass reinforced tub, and 6L (or 5.3) Cat Engine. The rest of the weight seems pretty much insignificant. Designing a brand new hull is cost prohibitive, splashing or recycling a proven design is much more likely.
I am reminded of the old line. *Quality, Performance, Cost* You can choose any 2.