Read a lot of reviews...ended up very confused. Made a decision to buy based upon reported problems and warranty service. When I first fired up the X4000, I was not very impressed (not near as good as my old RX-V1). But with a little reading and fine tuning, the X4000 blows my old Yamaha out of the solar system, making the RX-V1 sould like it was powered with a 9 volt battery! Much cleaner and better defined sounds at ALL frequencies--and Denoon is fudging on power output like Yamaha.
I am one Happy Buyer!