Go a get a used motif rack es or a motif es6
with the $300 instant rebate on motif es keyboard you can get it really cheap on ebay.
Do not make the same mistake I did. I bought a roland xv-2020 with srx-09 and srx-10 expansion cards, I returned after 3 weeks. Some sounds are good some others just lack sound quality.
I got a motif rack es for almost the same money I spent on the roland rack. Do yourself a favor and try the motif rack es or motif es 6,7,8(best sounds out of the box) before to get into any roland product. In my opinion it's like night and day a fair comparison between a xv-2020 fully loaded w/2 srx cards and a yamaha motif rack es. You need to tweak sounds on roland products to make them sound good. That's my personal experience after 3 weeks of headaches.