I've owned the Wadia 860(not the x) and presently own both the CD 50 and CD 55. They are all fine players. The Resolutions with their analog volume control (actually a fully differential dedicated preamp) has better extension. You don't lose detail at the end of the spectrum as you do with the Wadia. All of this is system dependant. If your amps and speakers don't reproduce these hz levels then you won't miss the dropout from the Wadia's. But at half the price for better performance it is awful tough to beat either of the RA models.
