Prelude 1 – J.S.Bach
The Prelude in C Major, BWV 846 is the first prelude of the first book of the Well-Tempered Clavier of Johann Sebastian Bach.
It is therefore affordable for a beginner who can read sheet music with a few sharps and flats but it takes years to play it correctly and bring it to life.
It was by playing this kind of song that I really felt the difference between my digital piano (a Yamaha CVP 503) and my grand piano. The more precise sensitivity of the acoustic piano allows a much more emotional interpretation.
EDIT: Today, with a good digital piano (Kawai CS8, CA99) plugged in midi on my mac and good VST’s, or with my Korg Kronos II, I can get as good results as on my grand piano.