Sorry if this has already been beaten to death, but my quick search did not seem to reveal enough... a lot of systems are available on the market that seem to fit the bill: DiveRite Nomad XT, Hollis SMS 75, 100, Halcyon Contour, and a number of others from OMG, HOG, ScubaPro, and probably several other manufacturers that I forgot to mention. Why would you choose one over the other? What do you particularly like or dislike in any of these systems? In the perfect world, I would be able to use the same harness for cold water tech diving, with 2 steel tanks and 2 stages, as well as for warm water rec diving with 2 AL80s and no stages. I'm not sure if this is really desirable... unless I missed something, none of these systems seems to offer quite the same kind of flexibility as a simple Hogarthian harness does for backmounted doubles, but maybe I am wrong. As a side note, I am somewhat surprised that even the Halcyon setup comes with a multitude of handles and D-rings in all sorts of places: two on each shoulder, two on each hip, loops sticking out from the wing... I am assuming this is necessary (and yes, I do plan to take a formal class in the near future, but I like to do my homework beforehand).