You have listed pro keyboards not arranger keyboards . I can try to help you .
I would look at the new Yamaha Motif . Reads Yamaha and Akai samples . Great specs .
The Triton has a sampler on board . I do not feel it would necessary to have the S2000. The S2000 has been discontinued for awhile.
Check out the Motif ! Bad name but should be a great keyboard . Dan o