the problem is, if you hit a rail you will not be able to warantee your armadas for ANYTHING, BECAUSE ARMADA IS MADE of CHEAP BITCHs who wouldnt replace my skiis after three weeks
i dont think rails are that bad for skis, ive never had any problems sliding rails except for the occasional edge getting caught on a box or what not, im sure if u come into a box with lots o speed, catch and edge, and fall forward, the edge might rip off but im not sure
depending on how hard u are landing on your edges on rails and shit, will help prevent you from breaking edges...or not.
i got a pair of volkl karmas this seaosn and heard they are bombproof and a half. they are my park skis. since my "all-mountain" consists of a 65m vertical.