I'm about to purchase my first reg. and my LDS/Instructor sells ocean master regulators, they go for approx $450 -$550 depending on the model, but I can get an Aqualung Legend or ScubaPro Mk25 S600 for around the same price. The oceanmaster has 2 360 degree swivels on the 2nd stage which I would think would lessen jaw fatigue, even though I realize that it is a potential point of problems. I want to go beyond my AOW cert. and I want to buy one regulator and have it serve my needs for quite some time. I live in wisconsin but don't dive ice or any water colder than I have to, but I will be diving Lake Michigan and such for more advanced certifications...hopefully Dive Master (midlife crisis thing). My prefered diving is mexico/carib. If anyone has knowledge of the ocean master regs, or suggestions, I'd love to hear them. I'd really like to support my instructor but with no other knowledge than I can find, I'm leaning towards the scubapro