I had a CF edition and currently have a standard ABS version Seawind. I can report that the CF sails just like the ABS version. There were two releases of the CF boats. The first release had issues with the keel pocket cracking. Kyosho later corrected that problem on their later version. All Seawinds can benefit from reinforcing that area inside the hull.
The CF versions were discontinued some years ago - the ABS versions are not being produced currently. There is no known release date, but Kyosho has stated they plan on continuing to offer the Seawind but won't commit a date for their next release.
The boats are fun to sail and have become quite rare. I'd keep it if it were up to me.