I need an opinion +k

So here is the situation I currently ski all-mountain and I'm looking to get more into the park. My sis has some 178 Liberty Larose in pretty good condition, slightly used, but no edge cracks, one filled core shot. She is willing to sell them to me for about $200. I was thinking I could get these to just fuck around with in the park. I've also been looking into buying some brand new 186 Hazmats. I would like the Hazmats cause i ride everywhere and are good in the park, and they would be brand new, instead of some used way smaller park specific skis. Cause I'm 6'3" 160, I'm not sure the 178s will be good for me. So i need your opinion on which ski i should get, cause I'm really struggling with this decision.