Replying to Different manufacturers Ski Lengths?

Hey

So im looking to get a ski around 175-179, (im about 5'11" 160, do about 50% park, 50% groomers/other so dont know if that sounds right..)

I think k2 measure some of their skis on running length, and some on total length - does anyone know which ones are measured which way?

had PE's and they were too stiff, so im looking at some fuji's or ar5's ( i know they are completely different skis..) and trying to decide what length to look at..

thanks - and any advice on ski choice would be great as well..