Nord, espescially the stage is a very nice keyboard..
You have 8 parts
- 2 piano/dp
- 2 organ
- 2 synth
- 2 external midi..

If you connect the external midi to left and right hand, for many the 73 synth/organ action stage 3 compact would make a perfect comtroller for an sd40..

Big thing about the sample and piano sid eof the nord stage is you can entirely load your own samples of choice, nothing is set..