How, if you want to spend < $70, wireless headphones, no matter how much you spend, are going to degrade the audio quality.
Why not just buy some wired ones? I bet for $40 you could get some wired headphones whose performance kicks the pants off even the $110 wireless ones.
When everything is right there on your desktop, in a normal configuration, I don't know why people care so much about wires anyway. With wireless you have to mess with batteries and making sure there's no interface, occasionally have to make wireless stuff perform handshakes so they connect.
For cheap electronics, I always check Sony first. Maybe check headphone.com too if you go wired.