It have to be taking in account that the PA800 is number 3. The PA2x and the PA800 are basically the same keybord (minus the 76 keys and others options).
A lot of people prefer the PA800 because:

- Less money
- Less weight
- Speakers
- Same music content as PA2x

I check with store managers in the US (GC and Sam Ash) and the PA800 out sells the PA2x 2 to 1.