sure, if I want to go with FB, I certainly have an expert in my corner...considering my old man owned Fairhaven Marine, which was a big motorcruiser boat building place in Sydney, back in the 70's-90's. His business was compulsorily acquired by the government, after the Olympics' rights were given to Sydney in 1996, as his business was in Homebush Bay.
His smaller boats were like 15 tonne.. so I am sure he is no stranger to fiberglass. But, I wanted to go with just flat panels and carpet, so I don't need anything quite as grand as your Coupé mdclear!
Happy to hear all suggestions though. I will be buying 2 x Polk SR 10" subs, reusing my 1800w Kenwood D-class mono and just keeping it simple...