Since you've already got a fairly narrow park ski with some camber, why not go for something wider (110+)? You'd have less quiver overlap and would have far more fun in deeper snow.
I'm taking a guess here, but since you're looking for a slush/pow ski I'd wager that you're looking for something surfy?
Try something that's either full reverse camber, or rockered with zero camber underfoot. Someone already mentioned the Faction CT 3.0 which would be my pick. Other options to look at would be the Volkl One (wider) or bridge (narrower). Could also check out the 4frnt devastator if you don't want to go super wide.
I'm just saying don't be afraid to get something bigger and more rockered than you're used to since you already have a park specific ski that works great on hard snow.
She needs less talking. More dumping them out - SeanTom