I saw earlier that someone said that they didn't want to buy AquaLungs because the were "French". My answer "Viva la France!" Where would we be today if not for the Frenchmen Emile Gagnan and Jaques Cousteau? Not only did the French invent SCUBA , but they popularized it and introduced it to the world through books, movies, and TV shows. "The Undersea World of Jaques Cousteau" starring the Calypso dive team was the best diving show ever produced. The French provided sport diving with an air of adventure, elegance, and romance. Instead of "narcosis" it became "rapture of the deep" a much more decriptive term. The double hose regulators that were produced under Cousteau's guidance embraced a diver like a lover and vented the bubbles behind his head. They were designed as a result of actual experience and were some of the finest that were ever made, the Mistral, DA AquaMaster, and Royal AquaMaster, for example. The balanced diaphragm first stage of the Royal Aquamaster, introduced in 1964, set such a standard of durability and performance that it has been carried forward in the Conshelf series and even up to the present Titan regulator.
Scubapro is terriffic also. A 1970's vintage low-air audio alarm MK-VII "honker" first stage coupled with a chrome-plated balanced-adjustable 2nd stage makes one of the nicest regulator combinations ever made. Put that on a Scubapro Depth Compensating Adjustable Reserve (DCAR) J-valve, add an orange Stab-Jacket, and you are ready for the big time!