well that depends i rode PE's last year and they were a lil stiff for a lot of park and the karma's are stiffer like the person above said but how much park per allmtn percentage are you that would help cuz there are a few more skis you should considder if its like around a 50/50 split
yea the pe's id say are still in ther but get like one size up from normal so theres more to charge with id look into the mojo's i dont know about them from riding but i lot of people say they hold up really well
177's would be about right. My sister is smaller than you and rides the 169's, so if you go for those then, well....that will be kind of funny. Keep in mind that they're a twin tip so you lose a lot of running surface through that (they're really more like 171-173).