Logitech Z906
Credit: Photograph by Greg Broom

This six-speaker system decodes Dolby Digital 5.1 (or DTS audio): If you stream Netflix movies in your office, this is a great setup, with 500 watts of power (165 of which are fed to the sub). It's a big, solid sound but lacks the richness of other speakers featured here. [$400; logitech.com

Rating: 6 out of 10