You will find it easiest to just creat a .mid file of your composition and IMPORT it into reason. Otherwise you will have to record one channel at a time to Reason.
After you have it sounding like you want in Reason EXPORT it as a .wav file.
I really know nothing about Cakewalk. But how are you getting the Ensonic into Cakewalk? Midi I hope? But then there wouldn't be static?