the best surround sound experience is from 7-channels, (side and back surround speakers), a full 360 degree soundfield. and the best surround format is either a DVD encoded in Dolby Digital EX, or DTS ES, or THX EX. these provide additional back surround effects. visit this site:
http://timefordvd.com/tutorial/SurroundSound.shtml some are Star Wars 1 and 2, Toy Story 2, T2 Remix, Ice Age, but more are coming out each day and more are listed on that site. go EX/ES to show off your system to your friends! it's hard to be surrounded by sound with only 2 speakers. Scott

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Home Theater can be affordable, ask me how.