There are currently no 8.2 standards. The only extended standards over 5.1 are 6.1 and 7.1, and even these haven't been really standardized yet. Examples of these standards are the DTS ES Matrix/Discrete, Dolby Digital EX(Matrixed, aka THX EX), Logic7 and Circle Surround. However, no current soundcard can do any of these standards, so its pretty pointless to just get another set and surround yourself in diffused, delocalized sound.