I have lurked for years here, enjoying the knowledgable discussions and subscribing to Gene's YouTube channel. I've been content to do so since I feel so many posters here do a better job than I ever could with their patience and expertise.
However, I'm going public since I see this question asked occasionally, with the Rocketfish, SVS and Dayton solutions mentioned but the general consensus is that there's no better solution. YMMV, but I've had good luck with Outlaw's OAW4. It's similar to the others in that it uses the potentially crowded 2.4 GHz WiFi band, but performs well for me in my kitchen where wiring the surround speakers simply wasn't feasible. It never drops out, and I only hear the clicks sometimes associated with wireless transmission maybe once every two months or so.