I you are looking for something from Roland, with a similar sound and liveness, but less weight, you might check out the E60.... still got 76 keys (you'll miss that on the PA800), and a LOT in common with the G70's OS and sound....

But I agree, the PA800, if you like the styles and sounds, has a lot going for it. It will be informative to hear a review from someone so used to the G70 sound.
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An arranger is just a tool. What matters is what you build with it..!