A previous poster mentioned something about the wave of the future. Modern fighters are able to make screen selections using HOTAS buttons on the stick and throttle controlling a curser on each screen, very similar to operating a mouse with a computer. Maybe a bit beyond what's needed in a homebuilt, but the capability and flexibility aids in maintaining control of the aircraft while rapidly making selections. Menu select buttons on the perimeter of each screen like what Skyview has are still there, but the slewable curser is fast and easy. Obviously, it requires an interface between the throttle and the EFIS adding to the complexity of the avionics suite, but this technology is 40+ years old. Having personally flown with this capability, I would buy and incorporate it in a heartbeat if it were available today.
J. Baker
RV8 Finishing