I haven't heard Empirical Audio. (My guess is without the upgrades they are very close...some people reported that EA pulls out ahead with the upgraded power supply.) I do have the W4S Remedy connected to a CD player in one of my systems, and yes, it made a big difference and I think is a great deal. You can also buy a Sonos box with the Remedy upgrade basically inside--much tidier. I will be interested to see what route you take!
cheers,
Margot
cheers,
Margot