Hmm. You chose a difficult one here. The Alesis has 64 note polyphony, 100 General midi, expansion card. The sound is Okay. Kurzes PC-88 has 64 Genrl midi and room for
100 customized setups. Polyphony technically
is 32 notes with layering. Single layer piano
is 64 voice. The piano in the PC-88 sounds better to me than the QS-8. I would suggest to look at both websites that can be found
in this forum. Also go to your music store to try both of these monsters. My opinion is an opinion, but its yours thats going to count regarding your purchase. To me both are great instruments.