Replying to Buyin powder skis for the season

What up guys,

I have Rossi S5s right now that I use as my all-mountain skis, but they just weren't cutting it for me in heavy pow/off-trail/backcountry. I'm looking to get some fat powder skis that are versatile but can tear through shitty snow and float on any pow.

I'm 5'7" and 132 lbs, expert skier.  Right now I was looking at the Line Prophet 115, 4FRNT CRJ, and the Armada JJs.

Suggestions? I'm tempted to get a longer ski but I don't want something with too little control.