Amazon.com has a Logitech Z680 5.1 Computer Speakers (5-Speaker, Silver) for $244.94 after $20 rebate with Free Shipping. Probably the best speakers you can possibly get for your PC. REVIEW
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- built-in Dolby Digital and DTS hardware decoding, Dolby Pro Logic II n
- Simultaneously connect four audio sources, including PCs, game consoles and DVD or CD players n
- Feel earth-shaking bass with 450 watts RMS of thunderous power