I use two keyboards live: a Yamaha MODX6 (upper) and a Nord Stage 3 Compact (lower), both played  through a Mackie DL1608 Digital Mixer into a pair of QSC K8.2 powered speakers. When the main house sound system allows, I run in stereo. 

The Yamaha MODX6 is used for horn sections, saxophone, acoustic and electric guitar as well as lead and poly synthesizer sounds. Occasionally, when the Nord is being used for organ, the Yamaha may be used for piano, electric piano or clavinet.

The Nord stage 3  has a semi-weighted 73 key keyboard.  I use it primarily to emulate acoustic piano, Hammond B3 organ, Clavinet, as well as Rhodes and Wurlitzer electric pianos.