the tail on the concepts isn't very high compared to other twinnies (i.e. any line ski) but it serves its purpose. skiing switch is no problem. i'd go with the longer ones if i were you. it all depends on how you ski and what your preferences are though. these skis are pretty durable. if you get look bindings for them i believe the warranty is bumped up to 2 years, but don't quote me on that. ask your shop.
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'I don't care if you care or if you understand because i'm a little kid and I've got little problems and I don't give a shit if you don't understand because: I got me. That's all I need. And I live comfortably, and I sleep peacefully.'
-catch 22