It may not be heavy, but I would normally want to use only NI B4 in addition to a piano module like NI Elektrik Piano on my live sets (i play with a big band).
The Indigo would be much more practical concidering space use and cable mess. It only has a mini-jack output though.
BTW: Can anyone recommend me a good piano module for "normal" piano sounds? It should include some rock pianos/"power grands" too. Rhodes/clavinet is not important, as I already have Elektrik Piano.
