Again thanks for the replies. I hope to make a decision by this Saturday. Tentatively have a dive planned at Monterey on Feb 8th. I will certainly reply back to this board on my decision and feelings about the reg. I'm not sure if I would be permitted to put a reg into my mouth at the dive shop just to get the feel, but perhaps if I bring a sandwich baggie along with me that will be possible. My selection list in order of preference at the moment is Apeks TX100, MK20/G250, Dacor Viper Tec, and Mares MR12 Voltrex if they are still sold. ... Bob