If you can wait to look for sales, I got my X2 dual for $190 when they were first available. Don't expect to helmet mount one and bar mount the other or use them seperate at all. They are hardwired together coming to a Y. The cable is about 13-14 inches total. A few inches coming off the battery where it Y's off, then each light has about 8 inches of wire running to it.
Never used a helmet mount