I've got the 7.1mtr with 150 Evinrude - good for 40 knts, and certainly flighty. I can get it airbourne off the back of a sunseeker wake with ease.
Tubes do sit fairly high so it moves around a bit at anchor. The only Issue I've had was the transom started to crack very slightly, Biffer on here fixed it very quickly - he knows a lot about their evolution so might be worth takling to him.
Other than that it's been bullet proof and solid in some fairly heavy seas.
Only two things are infinite, the universe and human stupidity, and I'm not sure about the former --- Albert Einstein