just to play devil's advocate, u're only 130 lbs. even if u're 5' 10' that doesn't matter as much as weight i'd say.  i know guys who ride all mountain (not alaskan pow or anything tho) that are like 160 lbs. and they ride 175's - 180's.
Just sorta figure it out from ur old skis I'd say, and take into account any progression in ur anatomy, skills, agressiveness, terrain.