Fuck new skis man, eat some fucking food!
I dont want to sound like a prick but your really underweight bro.
the problem with 181 is your the right height for the ski but your not the right weight. And believe it or not ski sizing has a lot to do with weight( and skiers ability) rather than the height of the skier.
That being said your only going to gain weight, not get shorter so 181 should be safe.
Also I dont think ive heard of anyones blue steeles becomign un rockered, theyre pretty good quality skis from what ive read. Ive been on the fence with picking up a pair for a while