I have a PX-880. It is I think in the last series. They are on clearance at Sam Ash. Not portable with wood veneer, but very thin dimensions.
The grand piano sound is impressive for such an inexpensive unit, and the feel is excellent.
I think Casio does a great job. This new keyboard would be great for gigs, and in more exacting circumstances, could be hooked up to a computer for a better sample.
Beakybird