Replying to Pow skis for steep, tight trees (East coast)

Looking for a pair of pow skis for the east coast.

5'11"
160lbs
Agressive, moderate technical skill

I need a ski for steep and SUPER tight trees, a pure powder ski, but for heavy east coast pow. All indications are toward the Billy Goat, what other skis should I be looking at? Rockered pintail appeals to me, it would help when pivoting. I don't really know of any other skis like this, maybe the S3 or S7.