I had several Ketron keyboards, the X1, and 2 SD1s, terrific sounding boards, even now over 4 years old, still sounds Great!! for example, the saxes, choirs (shame on Yamaha for not doing anything in the T2 choirs), Organ sound with leslie etc, the SD1 has better sound, now the acoustic guitars sound dated but, in overall still a great board....downfalls (to my style of live playing) poliphony and dynamic alocation.....is a little slowww to me, aldo not everyone has the same style of playing, perhaps, for many is ok.
I recomend very much Ketron.
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mdorantes