Diki makes a good point that it could be years before Casio comes out with a compelling mid-range arranger.
It is foolish to discount Casio because they make cheap keyboards for Best Buy.
All of Casio's products are good buys for what they deliver.
And the Privia PX-330 is a tour de force in that it is light weight with a great piano feel and a fantastic piano sound for it's low price. In addition, it has some entry level arranger features.
Even though Casio cannot make a lot of money in a higher end arranger, they might want to do it to add to their prestige.
Beakybird