I use Noteworthy and Noteworthy imports MIDI so MIDI would be best for me.

ABC would be a good second best as there is now a converter online to convert ABC to Noteworthy or I can convert ABC to midi and import to Noteworthy.

Scorch is no use to me at all as it is only available for Windows and Mac and I am running Ubuntu Linux. A Check on the Wine database suggests that you can get it to run in Linux using Wine but you have to install Firefox for Windows and even then it does not run properly - problems with sound. Also I see no point in messing about installing Firefox for Windows just for one software company's plugin. Overall, Scorch is a none starter in Linux as far as I'm concerned.

Whatever you finally decide. please, please make sure it is platform independent. Midi and abc both meet that criterion. Scorch does not.