Replying to East Coast Twin Top Choice

140lbs
5'8
80-90% Park
10-20% Rest of mountain

Looking for a buttery ski that will do well in the east coast, but will be able to survive out west when I travel

Currently ride 167 stl's and are just to small, want sumthing around 10cm bigger (give or take a few cm's)

Want a ski that has a sidecut that is 100% twin tip (invader ex. 110-81-110), or close to it

iam clueless because most skis that seem to fit my criteria are 181 or 180, and iam afraid they are just to big

well please help me out, i dont know what to do
thanks