I am new to diving and I am unsure about what brand or gear to purchase. I am living in Okinawa, Japan and it is mostly warm here. I want to purchase a new BCD and Regs. I recently purchased a TUSA IQ700 computer. I have been reading the reviews on a lot of brands and their products. I want to buy a reg that can use Nitrox also, because we have free courses on my base here. I have been looking at Mares and Cressi. I need help.