I have the Razor Kraken 7.1 Chroma USB for gaming with teamspeak. The audio is okay, I had to EQ out some of the bass. It is better than you average headphone, but nothing spectacular. Honestly the best part of the headphones are the mic and the Razor Synapse software... whatever algorithms they use for the ambient noise reduction is truly grand. I've never used anything that works so well. I use it to record example / demo videos from desktop recordings as well in a rather noisy environment (window A/C, and two toddlers in the house) and the only thing recorded is silence and my voice in the audio. Works incredible as a Skype / VOIP headset as well for the same reasons. Razor really hit the nail on the head on the mic pickup, it is by far the best VOIP headset I've used, and I've spent more coin on supposedly top of the line VOIP purpose built headsets.
If you already have a good mic setup or it is not important to you head on over to
http://www.head-fi.org/f/ don't bother with gaming centric reviews. For good audio I use a AKG 271 MKII ran on an external DAC/amp, it is a very neutral setup so it may lack the bass punch many consider the hallmark of good sound, as well they are not the best headsets to use without an amp, originally picked them up for listening to music at the office so I went with a closed set, you typically get better sound out of open headsets but then you get less isolation.
Honestly your best bet is to load up some music / sample audio you like and visit a brick and mortar to audition headsets and get the one you like.