There's DEFINITELY a huge market for that, as the recently released half baked, half hearted attempted upgrade from Yamaha clearly demonstrates.
Cheap = definitely in huge demand, and even so is LIGHTER.
I think we WILL see a new Audya soon. Ketron is not going to sell the new sounboards seperately, neither will they trade in the older ones for newe ones... And neither will they install these boards without upgraded sound samples!!!
Make sure you'll fly forever!