Hello Gibson1
Remember the old saying “One mans meat is another mans poison”, the same applies to keyboards, so listen to demos and if at all possible (The recommended option) spend some time with the boards for yourself.
You also have to make a decision between Hardware Arrangers/Synths, Software Arrangers/Synths using a computer or an instrument that uses a combination of the two. (And don’t forget to take your budget into account)
Sorry I cannot be of more help, but do a search on the synth zone forum, and you will find all types of opinions, demos and links that relate to what you are looking for.
Bill
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English Riviera:
Live entertainment, Real Ale, Great Scenery, Great Beaches, why would anyone want to live anywhere else (I�m definitely staying put).