I ride a firewire flexfire FST but with an extra layer of carbon and 4oz glass on top, I would suggest you dont get the rapidfire model as the deck is not as strong, especially if you want to ride with straps. This is from the firewire website.
"The interior carbon rods work with the bamboo skin to optimize flex patterns, maximizing speed and drive through turns, and while not as dent resistant as the DD or FST aerospace composite skin, the bamboo does create significant compression strength."
They are sick boards but if you want to ride with straps you either got to reinforce the deck or wait for the new kiteboard models to come out.