Replying to What to demo/buy?

Okay, I'm heading to Mammoth in a few days and I have time to demo two skis and decide what to buy.

I'm 150 lbs, 5'11", west coast, mostly park but I head to powder whenever there is some.

I'm want something a bit soft for park, but stiff enough to do trees, powder and carving on groomers. Something with pop and on the lighter side too.

I need to pick two of these: ARVs, AR6s, MSPs, or Chronic Blends. If you have any other suggestions that would be awesome.