Be careful to not assume that everyone wants semi weighted action. Heavy action is only better if you are a piano player. Lighter and faster the better for me.
DonM
Korg's semi-weighted action, as well as Yamaha's and Roland's, versions, are all still pretty light and fast...much around the same feel as the old M1's,DX7's and D-50's.
I only like weighted (piano style) for doing/recording solo piano pieces, so I midi up a Yamaha P-95 (88-note weighted hammer action) to the Tyros4 for that kind of playing.
For arranger play, however,
61 semi-weighted, as in your PA3x and my Tyros4, is the magic number.
Ian