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now my personal tastes and experience
wireless is terrible if you are picky though. Astro A40 wired is really good, with or without the mixamp(mixamp requires Dolby Digital Live soundcard to use) and uses SPDIF which really is and should be obsolete, I won't get into details but 5.1 over spdif is stupid, it only supports 2.1 and anything above that has to be compressed, send over spdif, then decompressed by the receiver(Astro's mixamp in this example) thus adding audio latency.
Get the A40 without the mixamp if you have a good soundcard anyway if you are looking to spend $200
Also, and obviously, anything Sennheiser is good.
I'd like to try out the Asus headset.
But yeah, fuck wireless. You definitely want over the ear, comfortable, and as light as possible if you game long time. Higher ohm is better, but at some point they will require a headphone amp to drive properly. Like a lot of the high end stuff($200+)