I can see the S910's screen from almost every angle...in fact, it is one of the better arranger screens.
I like the setup on the S910...excellent ergonomics, and easy to navigate.
A tilt screen would be okay, but not necessary, in my opinion, and same goes for a touch screen...not really needed.
Ian
_________________________
Yamaha Tyros4, Yamaha MS-60S Powered Monitors(2), Yamaha CS-01, Yamaha TQ-5, Yamaha PSR-S775.