The Arctis 5 by Steelseries, which uses a 40mm driver. It uses a USB or Single 3.5mm, 4-Pole Plug via included adapter connection with a 3m cable. This delivers a frequency response of 20-22000 Hz and a sensitivity of 98db. It also has a Bidirectional microphone with a frequency response of 100Hz - 10000Hz and a sensitivity of -48 db.
The Cloud II by Hyper X is a 2 channel gaming headset, which uses a 53mm driver. It uses a single mini stereo jack plug (3.5 mm) connection with a 1m + 2m extension cable. This delivers a frequency response of 15Hz–25,000 Hz and a sensitivity of 98 +/- 3dB . It also has a Cardioid Condenser microphone with a frequency response of 50 - 18,000 Hz. And only weighs in at 350g.