I would really recommend checking out another cat. Isotopes are not meant for the ocean. I have been to the factory and seen them built, and while they are great lake boats, they are not designed to handle the rigors that ocean/bay/etc put out. There are many other boats that will suit your needs that can be easily righted also. For that matter, at 220 lbs, you could solo-right an Inter-20, much less some other boats. As far as sailing with family, etc goes, I strongly recommend a Hobie 18sx or magnum. You just can't beat the wings. Add Rick's solo-righting bar, and you're golden! Good luck!
Trey
N20 314
Layline Rigging
www.velocitysailing.com