I tried the va-7 and I found it good but not enought to compete for example with ketron X1 and it's price is high as the X1.

I always wondered why a company at the size of roland doesn't always deliver superior products in all domains. I think the logical answer is that roland produce hundred of products and can't put a lot of attention on all of them, while ketron for example are specialized only in arranger keyboard and can focus on a single product to make the best of it. Probably roland are happy to be in the second or third place in hunderd of products instead of only being the first in a single one.