Apeks XTX 200
Get this, and get it now!
Seriously, you d be hard pressed to find a better regulator ANYWHERE. Apeks produce some of the finest regulators in the world, and the XTX200 / FSR combo is their top of the line version. Whether you use a longhose or shorthose configuration, separate first stages or single doesn t matter. This one provides you with a steady stream of air in all conditions. My personal setup is 1 XTX200 on 210 cm longhose, 1 XTX200 on 61 cm hose for backup and 2 FSR first stages, and it s simply amazing how consistently and smoothly they work. I have never experienced a freeflow nor any other problems even in very low temperature conditions. Best of all has to be how you never feel short on air, as much as you need, this setup will provide.