The Audya 4 is much larger and heavier, and as you mentioned, more expensive. Ketron support and communication from Italy are not great.
I may end up with one anyway though, if the Roland falls short.
The A4 has bigger screen, built in mic processing and vocal harmonizer, etc. Also I'm interested to see what A.J.'s new software package adds.
I like to experiment I guess! It would be much more expensive to experiment with an Audya 4.
I have been very pleased with the lowly Roland E50, and the specs and reviews say this module should be even better.
I am constantly trying to get my setup as light and quick as possible. There are always trade-offs, but I can work just fine with ANY current arranger if need be.
My next experiment could well be Yamaha's successor to the PSR910, maybe late this year.
I like to keep two complete setups both for backup and for those occasions when I have two jobs the same day and don't have time to move everything between them. This happens several times a year.
DonM
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DonM