Why does Schumacher manufacture and market SO MANY different models of battery chargers??? All I want to find is a good-to-great deal on a smart, 3-stage charger with battery maintenance functions (equalization and desulfurization). Is that too much to ask? Can anyone make some good recommendations, please? I do not have a battery yet, but I'm thinking of getting a Group Size 24DCC deep cycle battery from Sam's Club (75 amp-hour rating) for $70. I'm currently considering the following Shumacher chargers, but I'm not sure they really do everything that I would like one to do, like make PB&J sandwhiches. But I like that they are $50 or less. SC-8010A charger from Sam's Club ($50+tax) XCS15 charger from Amazon ($47) Anybody have any other suggestions for consideration? I'm not tied to Schumacher, they just seem like a somewhat reputable brand.