All I meant by my comment was that I will probably just dive SM even for open water diving, but having not trying it yet, I can not say that is for sure but it is a definate possibility.
Ok well I'm not sure why SM appeals to you. Its actually a bit of a pain to gear up on a slippy shore for instance. Or climb a boat ladder. Not all boats can accomodate you de-gearing in the water next to them. Or stagger across a boat deck from the benches to the door to the water. Humans quite naturally carry a tank(s) like a backpack. 90+ lbs of weight slung under the arms - not so natural.