10 small drivers are, based on reviews, somewhat inferior to 2 full-size 49 or 50mm drivers. Then again, I would like to see the true 7.1 surround sound in action, though. But assuming these sound like the Tiamat 2.2s, I wouldn't touch them with a 10-foot pole. They just sound really bad, especially at the price you have to pay for them. The Krakens are just as bad, but they're cheaper, so yeah.
Having tried a few of their headphones and headsets before, I could say that they aren't really made for bassheads. They're probably just made for the general public who like to play games and don't know any better. IMHO that is what Razer's aim is.