You've got your plasma-flatscreen-wall-mounted television set (Ha! "Set!") already. What you need is to turn that big ole box into a
cinematic experience (because as we all know, no cultivated film buff would view
Toy Story 3,
Inception or however many
Days any other way). Add an inexpensive home theater system to hook up to your current TV, like Denon's home theater system, featuring an AV receiver and Boston Acoustics 5.1 speaker package.
$598 from Bob & Ron's Worldwide Stereo, 754 Route 309, Montgomeryville, 215-368-8343, and 58 Greenfield Avenue, Ardmore, 610-649-7002.