ive been in the smaller version Zap weather was calm that day so cant tell you how they are in the rough,
i would make sure i visited some of the other boat dealers that are selling boat of this size and ask lots of question,
thickness of hull for one, total weight of boat would also give you an idea of how much metal is in the boat for strength,
check out these 4 first McLays/Surtees/Senator/Ramco or even a White Pointer if your pocket can handle it,
they may be more expensive but there is normally a reason, thicker hull more support internally/externally, lots of little things which can increase the price which your not aware of,
dash lay out, overhead lay out, windows, do they block your vision, can you put your head out the side window, is the wiring going to full down how is it hidden can you get to it if needed,
can you stand on the roof, how much support is there when walking around the side,
once you have looked at other similar boats, it will give you an idea at least on what else is available...
sometimes even second hand is ok...
Thanks for everything you did for us Eric. may you rest in peace, You were one of the real legends of NZ recreational fishing