I think there will come a point where arrangers can't sound any better, just different, unlike 20 or so years ago where you could say that certain brands always sounded better over another (or more professional) than others, not so much now, they have all caught up and reached a peak. For example for me, talking about TOTL models, I noticed from the Tyros 5 onward whereby for the first time I wasn't envious of wanting the next model so much, that goes for the Genos as well, although both are fantastic, neither of them have wowed me enough to change from my T4, that's why I'm finding the mid range arrangers more exciting to experiment around these days & at a reasonably affordable price whilst still retaining a high quality. I could have easily bought a Genos recently but instead bought an S975 & PA1000 and still would of had money left over!