The Phantom Flex4K is the upgraded version of Vision Research's Flex high-speed monster, designed to be production-ready with form factor improvements, audio options, and the ability to record to compressed formats. Check out the pyromaniac-friendly debut short and our interview, co-presented with FreshDV:

Though this is a rental item (unless you want to forgo that Porsche 911 you were about to buy and spend $150k on a camera instead), pricing and availability is over at AbelCine.