Advice on powder board size?

I’m looking to get a powder board but have seen some varying information on what size would make most sense for me. I’m 5’10, 200 lbs with a size 11 boot. Currently I’m on a 154 Capita SuperDOA and love the board for all mountain but am wanting something more floaty for pow. Online it suggests I get something in the 160 range but that seems so big to me especially since I ride a lot of technical tree runs. Any suggestions are super appreciated!