I suggest you get a separate headphones and a mic for better quality of both.
If you want a good all-in-one i suggest the corsair vengeance 1400 / 1500 v2 / 2100.
If your motherboard is fairly new (less than 3 years or of very high quality / very expensive) i suggest you get the 1400s as they use analog sound while the 1500s and 2100s use a separate sound card built into the USB connector which will most likely give you a worse experience (in terms of sound quality).
Of course there are other higher-end options, but the corsair vengeance 1400s are the best in the under 100 pound price range, coming in at about 60 - 65 pounds.