That said I'm really happy with my Logitech G930s - I usually use them wired to keep the charge (the usb cord length is _very_ generous) but they're just fine wireless too, and do a good job staying put if I'm moving around a bit.
My only complaint is that they seem to be sensitive to 2.4ghz interference, which can kick them off the wireless connection. Since there's no wired override (plugging in is purely for battery) this means plugging in can't save you. Once I switched my devices at home to prefer 5ghz wifi, it went from 5-10 times an hour at its worst to once or twice a month (and I can maybe blame that on the neighbours).
There doesn't seem to be a bluetooth alternative. The newer Sennheiser models like the 4.50 are not as big as the HD 558. There's a dongle-based wireless headphone, the Logitech G533 which is big enough. It's meant more for gaming, and looks like it. It may only work on Windows, though.