i'm male, about 5'8", 200lbs and i'm a pretty basic skiier. i've only rented skis before so i'm not sure what size i need exactly, last year i used 140cm's but i've gotten taller, i'm guessing i need about a 160cm, i dont know though and i dont want to end up buying the wrong size skis and poles. i'm probably going to buy them on ebay from a seller i was recomended. if anyone could shed some light on the correct sizes, i'd be very grateful. i know i should go with a boot about one half size bigger than my shoe size right? also, are demo bindings safe to use? some auctions say the skis come with demo bindings, what exactly are the differences?