The Deep 6 Signature Regulator can be found at deep6gear.com
If you use my buddy code, BUDDY-BHMVGH6 or you can get to their site with my affiliate link: http://www.deep6gear.com?acc=108
This is the Single Tank Regulator package.
The 1st stage is a Balanced Diaphragm first stage with 2 HP ports, 5 LP ports, a swivel turrent, and is environmentally sealed.
The 2nd Stages are also balanced, and includes a Venturi lever and breathing adjustment.
Deep 6 regulators are Nitrox compatible and can be used with 100% Oxygen (for those who need an oxygen tank.)
If you are certified to do equipment maintenance, the regs come with service kits for both 1st & 2nd stages.