I'm install QRS systems. Here are a few items to consider: 1) You will need training for installing either system. They are not self explanatroy. 2) PianoDisc does not sell systems to non-dealers. If someone sells you a system you are paying a mark-up. QRS sells factory-direct systems. 3) A QRS installation requires an alignment box which plugs into the piano and allows systems parameters to be adjusted and saved to memory. PianoDisc may have a similar system. The QRS box costs around $360. 4) A tech at QRS said that QRS unit will play PianoDisc CDs but not vice-versa. Hopefully a PianoDisc tech will repond here to present the other side. Matt W., NY
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