I have all the owned all models of Ketron beginning with the SD-1 Plus Audya. They have all been purchased thru Frank Vantresca via AJ (distributor). Excellent support. All the Ketron models have been Ajamsonic upgraded. I have never had any issues with a Ketron product and they are truly way ahead technologically than anything on the market.

By comparison I have a Yamaha Genos and have a preorder for a Yamaha SX-900. All these instruments are absolutely amazing but Ketron is by far the most advanced. I've never had any problems with making amazing music on any of these keyboard brands. There are absolutely no bad choices out there.