i don't really understand if you're getting a quiver board to ride pow with why you wouldn't want it to be directional...
i ride a Heritage most of the time (similar board to your rice) and this year when i was able to add a pow board i jumped on a deal for a Jones Hovercraft (very directional).
if its a foot or less i'll still be on the heritage - i can charge the fuck out of that board and knock down all the tracked out chundery bullshit and ride pow and ride switch and hit jumps and boxes and trees and children and all that good stuff.
if its 14"+ i'll ride the pow board and i only care about going switch for like 20-30ft at a time and any board can do that
do you really ride that much switch in the POW?