Jerry:

I bought the PX400r and by the looks of the specs at the Casio site they are pretty much the same piano. I bought mine in December and used it for a few gigs and it did the job well. I was however looking for something that had more styles, better voices and found that in the Yamaha PSR3000. So when all was said and done I'm using the PX400r as a contoller for the PSR 3000. I'm having great results. I have the luxury of 88 keys and a good piano action when I want to play piano solo without all the arranger features.