I use Scuba Pro and Sub Gear. The reason is that Scuba Pro stands behind their products. I would suggest not buying on line. Sure you can get some good deals on line, but you cant get you hands on it until it comes it. Most dive shops will let you try before you buy.This can be very helpful. Plus, its alot easier to get service for your regs if you buy local. Be sure to buy your 1st and 2nd stage as a set. Go ahead and get your hoses including the inflater hose for your BCD and computer if you have an air integrated computer.