The Fatal Storm and Proving Ground (The 1998 Sydney Hobart Race) should be right next to Fastnet Force 10 on you bookshelf. There are a couple of examples of capsized boats with tethered crews.
When cruising wear a PLB. It "might" help.
Here are some could clips from 98 Hobart- make sure you see a 5 parts.
A capsize ratio of around 2 is considered to be getting into the slow-to-recover range. Nigel Calder's "Cruising Handbook," has a good section on relative strengths and weaknesses of hull design and explains this ratio pretty well. US Sailing and a number of other sites have info. on this ratio.