I don't know whether any multi-driver headphones sound very good. The cheap ones, like those ones Zalman have been selling for a while, certainly don't. The Turtle Beach ones are also pretty suspiciously inexpensive (though they have considerable fiddle-toy value!); it's not easy to cram multiple drivers into a headphone that sells for $US100, and comes with a mic and a control box, and still make the result sound good.
Since at least 90% of the market don't seem to be able to tell the difference, sound quality isn't often a priority (which is a shame, of course, because Turtle Beach audio adapters are generally very good).
Oh, and that "subwoofer" bass shaker thing is unlikely to be more than amusing - to my knowledge, all of the "buzzy" headphones on the market are gimmicky, like the ones I reviewed back in 2001. They're certainly fun, but you're kidding yourself if you think they'll give you The Cinema Experience, or actually add to the realism of games.
I recommend you spend the same money on a decent pair of regular stereo headphones, if you don't already have some.
You could afford Sennheiser HD 280 Pros or HD 515s, for instance (depending on whether you want sealed or open). Save up a bit more and a set of HD 555s could be yours. Or you could save some money, go for old-school looks, and get a set of Grado SR 60s. All good options.
Then, if you feel your surround sound experience is lacking (it won't be, in computer games; plain stereo headphones are the best way to listen to synthesised positional audio), you could start pricing surround processors for stereo headphones. All you need for great headphone surround is two drivers, because you've only got two ears; it's all in the signal delay and phase response, which multiple little drivers in the headphones are not actually very good at reproducing.