Both are good bindings, but Lexa is better of the 2. Or bump up to the Escapade. The Trilogy is hardly any better than the Rosa that costs significantly less. Might also want to checkout the Raiden Eris, Rome Madison Boss, or if you can wait, next year's NOW IPO for women.
17 Jones Storm Chaser . 17 Never Summer Proto Type Two . 16 Never Summer Swift . 16 Rome Pow Division ST x Snurfer . 16 Gnu Swallow Tail Carver . 15 NS Snowtrooper BIA . 15 Jones Hovercraft
17 Burton Malavita Wing . 16 Burton Genesis X
16 Flow Talon . 16 Flow Hylite