The Razer Tiamat is cool looking, but the mic is a piece of ***. I looked at the others and they are not bad, but i would recommend this. Get the razer carcarius, it has a lower failure rate, great sound and mic quality along with being comfortable. The megalodon and Tiamat have a nice price tag, but thats where it stops i know as i am an owner of both. I reviewed the others and they are not bad, but i still recommend the carcarius. Its a better headset and easier on the wallet. I wouldn't recommend steel series head sets i used to think they where badass for years, but i feel like they cant compare to razer.
Please let me know if this helps.