Wireless? Don't expect to find many responses here. All of the competent headphones are wired.
That said, if your main issue is that the wire is a point of failure, you could seek out a replacement headphone with detachable cables so that you don't have to muck about with opening it up and splicing in a new wire.
Also, it sounds like you want an open headphone. Leaks sound in and out, but allows a wider soundstage and won't muffle your own voice, even if it's circumaural (rests around the ear instead of sitting on it or in it).
If it must be a headset, you could go for the Sennheiser PC360, but as usual, that's wired (and I don't think it has a detachable cable). I actually can't think of any headphones with detachable cables that might be good for gaming at the moment. (I've gone Stax for my gaming headphone of choice, and nothing they make has detachable cables. Frankly, I'd want a secure connection given the high voltages these things run on...)
Some people actually seem to like Ultrasone and their distinctive S-Logic for gaming, but the models they cite are all closed. They do have some open offerings, though...and I haven't heard any of them, so I can't confirm or deny for myself that they're any good for gaming. (The reason I mention Ultrasone specifically is because I know their Pro models have detachable cables. I can't think of too many other open headphones with detachable cables other than the high-end Audez'e offerings, which will cost more money in total than you'd want to spend, I'm sure.)
Edited by NamelessPFG - 10/21/11 at 10:54pm