I use Genelec 8020 active monitors with my Nord Electro 5 and Korg Stage V1 tube keyboard. I also have a Traynor K4 keyboard amp with tubes.
http://traynoramps.com/keyboard/product/k4/
I’d say you need tubes if you want a sweeter sounding piano. That or a much better piano.
The above combo is ideal especially as the Korg has proper weighted piano keys and the Nord has organ style keys - I can midi out from the Korg to the Nord keyboard as well as split the keyboards to have two different sounds simultaneously.
http://traynoramps.com/keyboard/product/k4/
I’d say you need tubes if you want a sweeter sounding piano. That or a much better piano.
The above combo is ideal especially as the Korg has proper weighted piano keys and the Nord has organ style keys - I can midi out from the Korg to the Nord keyboard as well as split the keyboards to have two different sounds simultaneously.