Personally I prefer hybrid rocker camber on all decks, including for pow. At the same time, as previously mentioned, there are plenty of other factors that go into determining how well a board will float such as setback, taper, sidecut, nose/tail shapes, placement of rocker/camber zones, base material, and on and on...
16 Gnu Swallow Tail Carver . 16 NS West . 15 NS Snowtrooper BIA
16 Burton Genesis X . 15 Now Drive
16 Flow Talon . 14 Flow Hylite