In addition to the new AD-2600, I have the AD-600A which was a very popular player 2-3 years back due to its secret hack menu. That unit still works and plays great from day-one.

The AD-2600 is excellent. The build quality seems to definitely be there. Nice and sturdy and the power button is no-longer a mechanical switch that cuts power to the power supply (you can now power-down the unit from the remote). I wouldn't hesitate to recommend this player to anyone.