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mmcdds:I own an Apeks ATX50 and a Titan LX, I think the Apeks is an easier breather. The ATX50 also has a diver adjustable second stage, which I personally really like, but there are a lot of people who seem to prefer a non-adjustable second stage (one less knob to worry about), given a choice betwen the two I would pick the Apeks. That being said, let me reiterate what I said in a previos post, I still think the Titan LX is a reliable, easy breathing,reasonably priced reg.