And someone from the South of America could easily say they’ve no use for deep house and trance, but need more country styles, a musician from Central America could moan about not enough Guatemalan styles, a Jamaican could lament not enough reggae.

I'm sorry, but YOUR tastes and needs are not universal. I’d be willing to bet you might be the only arranger user on this forum that plays much 21st century trance! What is more puzzling is why you got your Ketron in the first place if the style list (you could download the manual before you bought it) had so little club music styles?

It’s not Ketron's responsibility to cover the needs of every musician on the planet, it’s the buyer’s responsibility to research if the product covers HIS needs before purchase. Particularly as trance/dubstep/house etc. are more the province of workstations and loopstations and analog synths. The arranger market as a whole is a bit older than clubbers and the majority of the content is marketed towards MUCH older players.

In the end, Ketron provide the tools to create club music from audio loops better than most arrangers do, which is how most club acts do it… but you have to do the work. Just like a reggae musician would have to create his own styles no matter what arranger he bought, a club musician is going to quickly tire of the few ROM club styles no matter the make. Then you are stuck facing how well the arranger works with audio loops, as you import stuff from your loop library. From what I’ve read, the PA5x still has some software issues that may make it difficult for you once the ROM styles stale….

Freshness is what drives the dance floor, I’m not sure I’d look to ROM styles to determine the best arranger for packing a rave! Easy loop import, time and pitch stretching and clip launching capabilities probably are the thing that will give you longevity.

Just curious, but why did you choose an arranger rather than a workstation or something like a Maschine MPC type tool if your main thing is club music?