Hi my friend,
have you searched the "Perc & Drum kit" voices and you didn't find synth drum kits?
(I have dance,studio,hit,room,electro,analog on my psr)
I like also the two Eurodance's pack drum kits of Yamaha musicsoft.The Dance power kit and and the Dub step kit.
There are packs also to buy with synth drum kits like those styles2psr is making.