RE: First Bow
If you goto to Matthews website....you can look up a dealer locator near you, I may be wrong but I believe they only sell matthews at smaller specialty type bow shops, not the big box type of stores, and at least my shop, has very knowledgeable people there, it would at least be a place to begin and look. Learn alot of info, and at least take that info with you when you goto one of the big stores, if you decide to.
If you really think youll shoot often and practice, Id say go for a 70lb bow, but if 55 is good/comfy and you really dont plan to draw much more than 60lbs, ever, or once you get much over 60lbs....its uncomfy, stick to a 60lbs.