As far as power trimarans are concerned, anyone has better studied the http://www.nwbs.com.au/Yachts_Overview.html website. Of course it refers to those huge boats, but most like the concept is there and could be used for smaller ones. The cost of fuel is surely a restraining factor. Has anyone made a study on the total cost of ownership of a power cat versus a sailing one? The cost of sail maintenance, cleaning, insurance, etc etc... When I think of a sailing cat the headache of clening sails, fixing them, etc. kind of offset the low noise and soft swing of them.... But those sailing cats (yapluka is lovely) with flybridge concept looks a lot more interesting.... Roger Jacob