If you want the OXYGENE / JARRE sound - and an Eminent 310 organ is to heavy, to big, to expensive for you - a Roland RS-09 "Organ / Strings" for example, can deliver a similar sound. Of course the sound is not 100% authentic like played with an Eminent, but it is a quite good compromise. The RS-09 is lightweight, compact and perfect for live performances. On this video you hear a Roland RS-09, a Roland DEP-5 for delay and an Electro-Harmonix Small Stone Pedal.