Re: DW 9000 vs. DW 5000
First a new pedal isn't going to make you faster. But lots of practice will.
I've owned DW, Axis,Iron Cobra and currently Pearl. Non of them improved my speed. Did I like some better than others? yes!
In my opinion I'm using a Pearl Eliminator now, but the new Tama Speed Cobra is hands down the nicest pedal out there.
Stay away from the Pearl Demon Drive.. It will not make you faster with the cool name it has. I think it actually sucks compared to the Eliminator.