Replying to Ski length

I'm 20, 5'5-5'6, 130lb. I was wondering what you guys recommendations were for ski length for me. I ski all mountain and a good bit of park. Like fairly decent sized jumps and jibs. I don't see powder very often living on ice coast. I currently have been riding 2014 K2 sights at 159cm since 2015. Definitely feel I need a longer ski. Been looking at some but wondering how big I can handle. I feel 170ish would be pretty safe but been eyeing some around 178. Does that sound too big for me? I've been skiing since age 3 so I'm pretty comfortable on my feet in all situations just don't wanna get stuck on something I'm not enjoying because it's too big. Thanks.