I've read through most of this thread and there is quite a bit of information here, so I thought I would ask a direct question of the headset experts.
I currently game mainly on my Xbox 360, but I also use my PS3 and occassionally my Wii. My tv is a 67" Samsung LED DLP. My AVR is the Denon 4311CI. I have a 7.1 speaker setup in my family room consisting of Klipsch RF82II L/R, RC-64II C, RS-62II LS/RS, and CDT-5650-C SBL/SBR. Current Sub is a leftover crappy Yamah HTIB I had from my first system and haven't had time to build my own yet. That being said, I am quite pleased with my current environment for gaming and movies, however, Modern Warfare 3 has thrown a huge wrench in my ability to enjoy the system. It's not that I don't enjoy playing it in 7.1 using Dolby PLIIX to matrix the last 2 channels, but my wife has an issue with the constant gunfire and explosions from when I play online multiplayer (first game ever to really annoy her and I used to play a lot of Rock Band with the ion drum set (that she bought for me) and playing mostly heavy metal and black metal, i.e. Arch Enemy, DevilDriver, MachineHead, with the occassional classic rock or song for the keyboard accessorry). It doesn't annoy her if I play once she goes to bed (as she can just barely hear the bass from an explosion or an EMP), but it drives her batty if she is downstairs while I play.
That being said, I now have 2 options. I can play with the sound completely attenuated, or I can buy a good headset. I have looked at the different options here and am thinking I would like to get the TB MW3 Deltas (cheaper than the XP500 right now with price match from Amazon). I need a wireless setup (3 crazy dogs and plan on having kids in the near future), so I was thinking either the Astro A40 wireless setup, the Astro Mixamp 5.8 with Sennheiser PC360, or the SoundBlaster Recon3d Omega. Problem with the Soundblaster is that it appears to only work with an optical input (which means I would not be able to use any other source than the xbox or PS3). My problem with the Astro setup is the dangling wires, so I can either get the TB PX5/XP500/MW3 Delta for the full wireless. I also want to be able to use the headphone out from my AVR so I can listen to my music (such as Amon Amarth) without giving my dogs or wife anxiety.
I read the reviews on the different options, and while the SoundBlaster would seem to be the best if it had the RCA Inputs or line in from 3.5mm, it doesn't so I need to exclude it. I don't want multiple dangling wires for the Astro mixamp, and I don't want to wait for Warheads (as I also use my PS3). Does anyone with experience with both the Sennheiser PC360 or A40 and the TB XP500/PX5/MW# Delta have any input that would make my decision easier? I would greatly appreciate it.