The RX6 offers 90% of the performance of the RX8 and requires less effort. Hard to go wrong with the RX series as long as the skier wants to ski with a little skill.
Another ski to consider is the Fischer Vision Vapor:
"FLOWFLEX VISION With every tech highlight imaginable the versatile Vapor is dressed to impress. The 50% lighter Vision FlowFlex allows for the easiest turns and best edge-hold. The Vision Vapor is the big league choice for girls going east to west, hard pack to soft.
Radius: 15m @ 160cm
Side cut: 118-76-102
Binding: V9 Railflex Din 2.5 - 9 (white/anthracite) ". Use the link below;http://www.sierrasnowboard.com/Fisch...mens-17699.asphttp://www.ski-depot.com/miva/mercha...oduct_Count=31