9000's are wayyy too soft, you'll spend entirely too much time on your bumpstops. The Vx doesn't have much clearance from the top of the bump stop to the axle, so it only takes a small bump to bottom it out and jolt your spine through the seat cusion.
Just my opinion.
I had doetsch build me a set of fairly stiff external reservoir shocks that make blazing down trails at high speed very comfortable, and with much better handling. I do air down the tires a bit too, which softens the ride even more.
Andy