G115D
Flew about 40+ hours on the G115D some years ago. Pretty nice handling, roll rate a little on the slow side. I'd guess about 90 degrees/second but faster than a Slingsby?
Very capable for recreational aerobatics and should be possible to fly Sportsman.
With a composite airframe, 2 seats and 180 HP with constant speed prop the cruise speed is somewhat disappointing. I rarely flew faster than 120 KIAS cruise and it's pretty loud. When talking about loud, so is the electric fuel pump!..
From what I know the running cost are pretty high and if you don't require a certified aircraft I'd certainly have a look at the RV6 or 7 instead. Excellent allround performance and available as either taildragger or nosedragger.