The Avatar Pro X5 by Armaggeddon is a 5.1 analog surround sound channel gaming headset, which uses a Front, Rear 30mm, Center 23mm, Sub 40mm driver. It uses a USB jack (power), 3 x 3.5mm connection with a 3 m cable. This delivers a frequency response of 20Hz - 20KHz and a sensitivity of 120dB +- 3dB at 1mW, 1KHz SPL.
The Kraken X by Razer is a 7.1 Surround Sound channel gaming headset, which uses a 40 mm, Neodymium driver. It uses a 3.5 mm connection with a 1.3 m cable. This delivers a frequency response of 12 Hz - 28 kHz and a sensitivity of 109 dB. It also has a Unidirectional ECM boom microphone with a frequency response of 100 Hz - 10 kHz and a sensitivity of -45 +/- 3 dB. And only weighs in at 250g.