I am running a hybrid rig. I have a KN7000 lower, and a controller keyboard on top to run my Muse Receptor.

The Receptor is in my rack, loaded with B4II, Colossus, and Kontakt2. I use it only for solo voices at this point. I haven't gotten into styles, loops, or sequencing yet. The Receptor is a 2.5MHZ, 180 GB HD, with 2 GB RAM in a rack configuration.
pa4X 76 ,SX900, Audya 76,Yamaha S970 , vArranger, Hammond SK1, Ketron SD40, Centerpoint Space Station, Bose compact