I have the same boat. 2006 Adventure. I bought the smaller sail, I sailed it a few times. Like on the 5th time, in winter in SC I capsized. If it werent for a friend with me, I might have had problems. As it was, it wasn't pleasant. I then ordered the inflatable amas. Excellent idea. For 180.00 installed, I got piece of mind. I know use them even if not using the sail. Keeps the boat so stable you can stand on it.
The sails for the other boat are twice as big and twice as fast. But you don't need to sail fast.
To convert, it will be difficult. Our boat is missing some internal fasteners and strengthners but it costs half as much. Only you can decide if it's worth it.