Replying to Liberty KGB vs. K2 Public Enemy

I'm looking for a new ski next year and I'm pretty sure that it's going to be between the KGB in 180 and the PE in 179.

I'm 5'11" 170 lbs
ski 60% park 40% all mountain (Pennsylvania)
and I make one trip out west each year.

I thought of those two, because both can be obtained fairly cheap, and they seem to fit the bill.

Currently I'm riding 04' scratch FS's in 174. I want a ski thats a little stiffer than that but not like a 2x4. And I'm going to be in the park so pop and durability is an issue too. I've heard in the past Liberty had some really shit durability issues but apparently they're resolved now?

Whats the general thought here?