It's worth posting this again . Here is rudess playing " arranger style " . We talked about this here http://www.synthzone.com/forum/ubbthreads.php/topics/291906/jordan_rudess_arranger_style

Question : what do you think he would be capable of doing with a real arranger with styles he customised himself ?

The truth is we have not really even begun to explore the capabilities of arranger keyboards. We have seen the incredible performances by marco parisi . But I'll bet if he really wanted to let loose with an arranger it would blow our minds . It's all about the creativity of the musician and to a much much lesser degree the limitations of the instrument .