I'm looking to upgrade my 11-year-old PX-310.  I'm considering either the CGP-700 or PX-560.   First -- On the CGP-700 how does the 3.5mm audio-in sound?  Right now I have the outputs from my audio interface hooked into the inputs on the 310 to hear pianoteq, VSTs, mp3s etc. from the computer as I play (either through headphones or internal speakers).  That works fine, and the sound is good.   Would the 3.5mm audio in on the CGP-700 sound comparable using a two mono 1/4 to st