Speed for money: nothing beats a windsurfer!
Surfer and Kite surfers overhere have several boards and a multitude of sails and mast. Each for optimal performance in a narrow windrange. The cost of all that is gettting very close to a catamaran. The kite surfers overhere, the serious ones, are spending more on the gear that one spends on a catamaran.
The picture is always more nuanced.
Wouter