hey i wanna get a pair of concepts but i was wondering, i'm like 5'4, 5'5 on a good day and 115lbs. should i get a 150cm conept or could a take the 165cm. i want a ski thats stable, but also one that is VERY quick turning and agile. i need some help...the 150cm or the 165cm? also, if i'm gonna go to 165 should i just go to a 168 and get some scratches? i need some help...150, 165, or 168?