I'm partial to Flux. I love their shit. So comfy. I've never ridden the rider's choice, but the lack of dampening isn't an issue on my NS Evo - the board has plenty of dampening. Both have great warranty departments, so no issue there either way.
I think you'll likely be happy either way you go. Hard to go wrong with either, to be honest.
"People say that marijuana smoking is going to get in the way of my career. I say to them that on the contrary, my fighting career is getting in the way of my marijuana smoking." -Nick Diaz