Aside from lacking somewhat in pointing ability, the Landfall series yachts are very capable off-shore boats and were some of the studiest built by C&C which was a good builder. Ensure the standing rigging is good or replace it and that all of the thru-hulls and ball-valves are in good shape and you should be good to go. The only addition I would make if you don't already have it is a good sturdy autopilot and/or vane. In many espects blue-water is safer than coastal as its usually the hard stuff around the edges that kills yachts.
"It is not so much for its beauty that the sea makes a claim upon men's hearts, as for that subtle something, that quality of air, that emanation from the waves, that so wonderfully renews a weary spirit."