Roland does have high end arranger keyboards with sequencing and good sounds (including drums), G1000 and a very similar EM2000. Both do auto-accompaniment, similar to your PSR, only better, with 8-track accompaniments, large selection of styles, etc.

You may follow the link below to see mine and other opinion of these.
http://www.synthworld.com/ubbs/Forum37/HTML/000114.html

Good luck, Alex
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Regards,
Alex