It's a great piece of gear, but having to use a separate arranger module takes out out of the running for "ultimate" status ... at least, for me. My days of separate drum machines are over
If you want an 88 highend key for stage use with high end arranger build in... you will not find any at all... so you are comvicted to use a 2nd keyboard or a module..
Sad but true...
However for 88 keys the Nord is quite light (13 kg) and the SD40 is less then 2kgs,,, so using this combo will not be to much of a handling issue... altough, i do understand that the extra cables and setup time might be a problemo..