On test day, I had the M64 out in a blustery Coral Sea that was hurling confused, foam-crusted 3s and 4s at us from all angles. The M64 simply ate it up with a spoon. I cruised her at 21 knots, where her range is right around a very respectable 500 miles — just about what you would want and expect out of a yacht built like this. When I dropped the hammer, she climbed all the way to 31 knots, which, I have to be honest, was more than I was expecting from a build this beefy (she displaces 86,000 pounds at her dry weight). Those speeds were thanks to optional twin 1,150 hp Scania engines (twin Volvo Penta D13-900s and twin Caterpillar C18 Acerts are also available). But even at top speed and launching off the tops of some of the day’s larger waves, we fell into a few unseen holes, and the entry was pleasingly feathery.