Replying to Ski for my girlfriend

Hi to all. I have some questions about buying gear for my girlfriend. She's 166cm tall and 54kg weight. She's study skiing, but i would like to buy a gear for many years, thats why i want a good stuff, a stuff for grown level. I looked for Armada Cantika and think they pretty good technically and in design. I know that Armada skis are light, but i don't know what's height to buy for her: 150 or 157? And what about binds: i think something like Tyrolia TH 11 will be enough and fine, is it? Thanks.