The Catalina 27 is a good boat for coastal cruising. It has fairly good displacement
and enough room to store your gear
. Plus, they're pretty simple and easy to handle. And as was mentioned in a previous post, a modified one was circumnavigated.
I would venture to say that most well-found boats will weather
a storm better than the crew. As the old saying goes, it's not the ships but the men
in them. Of course, the experience of the crew also accounts for knowing the limitations of your vessel. In fair weather any boat can cross an ocean. In bad weather things are different. If I were going to cross an ocean on a Catalina 27, I would certainly have to pay more attention to the seasons and the weather than if I were going to do it in a Westsail 32.
If I were you I would buy the Catalina 27 and learn to sail her properly in coastal waters. After a while, when you've weathered some storms and such, you will understand what she can handle and what she can't. More importantly, what you can handle and what you can't. Then I suspect you will be able to decide for yourself if you should do an offshore passage
with her. One thing is certain, when the ocean gets nasty, no matter what kind of boat you have it feels really small. In this case, the bigger and stronger, the better. But alas, we are limited by our own personal finances.
Good luck in your decision.
One thing I will mention. Beware of the unprotected rudder if you ground her. I had a friend who worked for Catalina, and many Catalinas (27 on up) are sunk because the unprotected rudder gets bent on hard groundings and the rudder post cracks the hull