I've been using the Astro A40 Wireless System for nearly a year now. The sound quality is fantastic, and they are extremely comfortable. I've put in many loooong sessions of Battlefield, Skyrim, Mass Effect, etc, and never quit because of headphone discomfort.
My one annoyance with them, is that they aren't "truly wireless". The headphones are actually wired, and just plug into the small wireless RX unit (which talks to a receiver box). A lot of times, I'll somehow end up sitting on the cable, then shift my head the opposite way, only to have the cable yank my head. I've also had the cable catch on things while up and about, refreshing my beverage between BF rounds. There is a quick disconnect, but it's not really light enough, and rarely releases. I strongly considered selling it for the truly wireless Official Sony Headset, but then the Vita came out. Since I can now use the same comfy Astro headset with my Vita, I've stuck with it. If only Sony could get 2 of their own products to work together! (Vita + Official Wireless Headset would be awesome!)