Just about a year ago, some of Yamaha's designers came to my store to discuss the next generation Yamaha PSR keyboards. Most of our discussion was to put the PSR3000 in a DGX505 keyboard design with 88 keys, not necessarily a weighted key action but rather the semi weighted action. I said to do it for around $1795.00 and they could sell alot!
It's exactly what the last post here suggested.
Let's see if where right!
George Kaye
Kaye's Music Scene
Reseda, California