I have a 5.5mtr cobra and have found it a fantastic ride in all weathers.
However, a friend has a 6mtr and the last time I went out with him in the Solent, I found the ride appauling.
Seems strange that .5mtr makes such a difference.
Had a run in a 7.5mtr a few years ago and found that very heavy going in a large swell. I think I'll stick to the sub 6mtr category.
Build quality I have found to be excellent, no problems to date.... touch wood.
The only hyper critical thing I could say about my boat is that it ships water over the transom when bobbing about in a bit of weather, but that's what pumps are for I suppose...
Agree that Dave is a nice bloke, very helpful when you call with queries...