Have you tried Spectrasonic's Omnisphere? No doubt, if you get on an electronica site, other great VSTi's can be suggested, too.

The trouble with electronica is, it is still a living. breathing form of music. It hasn't petrified into something so formulaic that an arranger can do it well. Arrangers are REAL good at copying older styles, because we know what they should sound like, but electronica is still evolving, happening, and isn't really able to be defined well enough for a style to be written that nails it.

Plus, electronica tends to be VERY different from song to song, or writer to writer. Arrangers tend to smooth over the differences, and just churn out a vanilla copy of the style.

But you seem to be stuck a bit here. You say you need a keyboard that does it all for you to get inspired, but the whole POINT of electronica is that you DON'T do the same thing everyone else is doing! Plus, if you need the keyboard to inspire you, arrangers don't come with a whole lot of modern electronica styles (or what few they have will quickly grow stale on you).

From how you describe your problem, I'd say go for a Motif, M3 or Kronos if you can afford it. Or maybe a used Karma. But beware! If you want to do more normal music AS WELL as electronica, the arranger will be the better tool.

But I still think the BEST route is to find a friend making electronica on a computer, and watch how they do it, and get inspired by THAT! In the end, software is the best way to go to make electronica, you just need to see someone's workflow and use that as inspiration.