After listening to the Wav. file, the horns/brass at the beginning sound relatively bland...no Super-articulation or DNC that I can hear, so I don't think it's a mid/high Yamaha (S750/950/Tyros) or Korg (PA-900/3x).

It sounds no better than a mid-range instrument (or even entry level) to my ears, irrespective of the manufacturer, although, as Bachus says above, most current instruments (regardless of level) sound pretty darn good.

Ian