A couple of tips:
1) When scrolling through the artist list on the Sonos controller, push the soft button labelled "PowerScroll". This will allow you to skip straight to any letter in the alphabet, like the W you mentioned in the review. This function was added by Sonos a couple of years ago following customer requests.
2)Sonos can actually play some DRM protected files from stores that use MS Play for Sure technology.
3) Get your microwave checked out, the magnetron really shouldn't leak that much interference and may be unsafe. Getting a unit with better shielding won't just improve your wifi signals, it will help protect your husband's fertility more than getting that laptop of his thighs!