I have only heard the P-4200 at the last CES back in January. I didn't just poke my head in the room and leave, I stayed a while so I could get a good audition. Anyway, it is an excellent amp. I would not hesitate to buy one. It sounded great on all genres of music, classical included. Of course with the A-35 you will have a richer sound, but I'll go off on a limb and say the P-4200 will beat it in speed, detail, and bass response.
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