The missus and I are new divers, as Ohio residents, we plan to do most of our diving in the Midwest, esp the Great Lakes, with the occasional trip to Fla or Carribean....Was wondering if there is a good "do-all" reg that we should be looking for while we are starting to accumulate our gear, one that will stand up to deep, cold dives and also perform ok in the warmer climates. Is there such a thing? Or are we going to have to get two sets of regs?....I know you are the ones to ask about such things..I await the flood of good replies..thanks and hope to see you all soon