For $50 or less, I'd say your usual suspects ( Creative, Turtle Beach, Logitech, Razer, ) are all going to be very similar ( and I agree with Dia, finding a good wireless set for that price is almost impossible. ) It'll just come down to the best deal you can find to duck under the $50 limit. I like my Turtle Beach PX22 and I was able to grab them around $65 last year on sale. Their Z22 and Z21 are also good alternatives. Or you can go on their online store and get a refurb set or a higher-end model if you like.
One important question is whether you want to use these with just your computer or with a console as well. The PS3 ( and I believe PS4 ) only do chat audio over USB while game audio is over the normal audio outs. Xbox 360 can do audio over USB, but you need something that can plug into the controller for voice chat ( and apparently 360 and XB1 voice chat connections are not compatible. ) I got the PX22 because it can connect to PC, 360, and PS3/4 with no problem.