Some have said their little Garmin hand held GPS's have shown speeds as high as 20kts, but I have only seen 17.7 on mine. This video (and my boat) is on a 16' cat though, the 18's and 20's are a bit faster, as you would expect.

Now, if you really want to blow some dough, there are new full foiling, 100% carbon fiber 16' and 20' cats that claim 30 knots up on the foils, but the 16' costs over $30K and I think the 20' is about $45K!

Too rich for my blood!

Here's the 16' foiling cat: http://www.youtube.com/watch?v=qgCz94GhcMc

Here's the new Nacra F20 carbon ($45K): http://www.youtube.com/watch?v=RgaV8EBeuO8

Here's a carbon 25' foiling cat, but it's also got a solid wing. These are called C cats, and they are well over $100K http://www.youtube.com/watch?v=_C8ll...92028CB1CB5B0A