I have a 2006 6.0m HD (no pretty front and rear chaise longues
) from new which replaced a 200 5.5m
I use regularly ( every month of the year) around the coasts and have no issues with build quality or seaworthiness.
I would say the weakest link was/is the quality of the wiring/ rigging which is why I did mine myself on the last one. When they were build by Dave in Bridgend they tended to use stanadrd car wiring and fuse boxes ! I replaced totally with IP67 enclosures and resin crimps etc.
Mine doesn't have the moulded deck which may have been part of the problem but I also had water leaking from the deck into the hull - all resolved by sealing properly around the cable ducts and fuel sender access under the console and seats.
Check particularly under the rear seats on yours. Still very pleased
An 8.5 must be a real treat !