That's kind of cool, I've heard many of the factory Karma demos before, but I wonder if you are taking into account the overall genre bias that Karma's content tends to have..? On the whole, I am not sure I would like to go out and gig with a Karma based keyboard without a TON of preparation, probably a LOT more than I would need to get either an arranger together, or the prep time to do the job with SMF's.

What Karma does is exceeding cool, but I just have always felt it is set up much more for techno and electronica fans than general gigging guys. While there are a FEW jazz GE's, it's hardly the main thrust of the content. And even fewer rock, R&B (old school!), disco, alt rock, etc.. You know, the things we often get asked to play.

Perhaps you are lucky enough to do a lot of Muse, or the more modern electronica bands, but I'm afraid that, for probably the large majority of arranger users, Karma isn't really set up for our type of playing styles...
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An arranger is just a tool. What matters is what you build with it..!