But..... it will NOT be an arranger, despite the 'intelligent chord recognition', etc..

If you need an arranger, firstly, there are several NEW, good ones for the money that the XS module is going to cost, and secondly, you have to go a long way to find a better keybed than the 76 note G1000.
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An arranger is just a tool. What matters is what you build with it..!