Given that recently you had PA4X and now you gave SX900 a chance, I'm not really sure that the industry of arranger keyboards has a lot more to offer.
I believe that he's had a higher-end Ketron and I know he had an E-A7 which is the defacto TOTL for Roland. That only leaves the Genos if he is going to stay with arrangers. Where's that guy that had the fake photo of everyone playing a Genos when you need him?