If you are just using midi, save as a midi file. You will have to reload your soft synths, but that can be done easily by saving presents. I am going back and forth between another DAW (Cubase and including audio) and it has become a three step process going between each DAW.
1) Save as a "midi File"
2) Export OMF (if audio is involved)
3) Save each soft synth present
then open the other DAW using the mid file, load all your soft synths in and assign the tracks.
Import the OMF if you have audio. Works well for me.
Good luck!