You don't have to buy separate components to help a loved one turn a living-room HDTV into a home theater. Within one package--or at most two--you can buy a DVD or Blu-ray player, a receiver/amplifier, a subwoofer, and five surround speakers. The cost? Anywhere from $100 to $3050 (estimated street prices as of November 16, 2010). Most of these products have not gone through PCWorld testing, but they have received high user ratings at retail sites.