Where are you located? Many here are US based, where Bang & Olufsen doesn't have a widespread presence.
There are a lot of options on wireless speakers, but keep in mind that none are truly wireless. They all need a power (or "mains") connection. With B&O, it's a "lifestyle" product with premium price for average performance. Want wireless speakers that perform and are compatible with more common products? Look at KEF LS50 Wireless, Dynaudio Xeo 2, things like that. More concerned about looks? Consider you don't even need the receiver with Dynaudio Music speakers, or Bluesound, Heos, and other speakers that don't actually resemble traditional speakers and sound good.