mStation
mStation 2.1 Stereo Orb for iPod

Sound Cards
Auzentech: Auzentech X-Fi Prelude 7.1 - Auzentech X-Tension DEN - Auzentech Auzen X-Meridian 7.1 Sound Card Review - Auzentech HDA X-Plosion 7.1 DTS Connect Sound Card
HT Omega: HT Omega Claro 7.1
 

Speakers
ButtKicker: ButtKicker Gamer