I'm in the market for a set of head phones to be mainly used for gaming. They do not have to be "gaming branded", but I do want them to be surround sound, and I'm not sure how many studio headphones do this, if any. 
Mandatory:
Strong preference (sorted):
Bonus points (sorted):
Note that strong preferences are not mandatory. If reviews for a given headset are raving and the headset is missing one of the preferences, I may be swayed yet. (E.g., I've been seriously looking at Sennheiser's G4ME One/Zero's.)
I'm currently running off of the mobo's sound system (GA-Z97X-SLI), but if within the price ranges listed above, I may also be convinced to get a dedicated sound card, but to begin with, I'd prefer to just run off of what I have.
*) Sound leakage is not really an issue, but I would like to not be disturbed by people walking around in the apartment above me, etc.

Mandatory:
■ Over/around ear (not on ear)
Strong preference (sorted):
■ Surround sound (7.1, but 5.1 may be O.K. - and pref. non-virtual)
■ Less than ~200£/$300/270€
■ Highly comfortable / light
Bonus points (sorted):
■ Wireless (×1½ for Bluetooth)
■ Noise cancellation*
■ Official Linux support
■ Less than ~150£/$220/200€
Note that strong preferences are not mandatory. If reviews for a given headset are raving and the headset is missing one of the preferences, I may be swayed yet. (E.g., I've been seriously looking at Sennheiser's G4ME One/Zero's.)
I'm currently running off of the mobo's sound system (GA-Z97X-SLI), but if within the price ranges listed above, I may also be convinced to get a dedicated sound card, but to begin with, I'd prefer to just run off of what I have.
*) Sound leakage is not really an issue, but I would like to not be disturbed by people walking around in the apartment above me, etc.