Physically go into a Guitar Center. It's not on their website but the stores still have them.
I'm in the LA area and the GC on Venture still has the PCR 800's.
From what I've seen of the new controllers, there isn't anything that compelled me to buy one over the PCR. Like I wrote earlier, it has 8 less drum pads on it. And I love my drum pads. The more the better. Couple that with the price drop and my choice was made for me.
I will say this; I do prefer the display on the A-PRO controllers. But, that wasn't enough of a factor to change my mind.
Lateef