Playing EDM myself, I find the Genos the best of the pack.
Plus there are free expansion packs over at PSR forum as well as the Yamaha site.
Lots of life control for EDM, multipads, arpeggios etc.
I am also not sure about creating styles from scratch.
Couple of guys over at PSR forum have done an outstanding job on the PSR-970, so I am sure it can be done ...
Eric
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Genos, PSR-S970, TC Helicon VoiceLive3, Mackie 802-VLZ3 Mixer, 2 Bose L1 Pro16, Electro-Voice ZXA1 Subwoofer