Originally Posted by InetRoadkill
stats: LWL: 33.5', LOA: 37', Displacement: 13500, Beam (waterline): 9.7', Beam:11.5', Sloop rigged.
These numbers indicate a relatively slender boat by today's standards, and clearly on the light side for a 37' cruising boat. Depending on the sections she could be a very nice upwind boat despite being perhaps a bit tender.. However without info on keel configuration, ballast ratio and hull form all of that is simply guessing.
For offshore work my fear would be the stress (mental and mechanical) of travelling rather quickly in large seas. Such boats require constant attention to steering through the waves to avoid piling into the back of a wave you're travelling faster than. Not a recipe for a comfortable ride in a storm. We have a fair bit of experience with a (smaller) planing hull and can assure you that no autohelm or windvane is going to keep such a boat upright in a seaway (I know - you're thinking "what about Open 60s?" - but you're not talking that kind of league)
A skinny lightweight boat such as you describe also will not have significant storage for stores, gear, safety equipment etc that a heavier vessel will.. another consideration for longer passages.
The fast vs slow debate has been going on for ages.. all have their proponents for all their own reasons.
But I do have to add that setting out on a self designed boat built through self designed software is a daring proposition - one I'd give a few years' trials before setting out for keeps.
Nevertheless, best of luck!