I suggest:
Get either the SD1 Plus or wait a little more for the upcoming SD5.....once you are Ketronized, I find very hard to switch to a Roland products, mainly for their arranger product trend in the last 8 years, have little to be desire, in fact, some die-hard Roland arranger owners, still hold to their aging G-1000-800 etc......anyway, if you are used to the features of a Ketron....stay with Ketron.
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mdorantes