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Today only, Amazon has the Denon AVR3310CI Home Theater Receiver on sale for just $649, the lowest online by around $150. The 7.1-channel model features 1080p upconversion, five HDMI inputs, seven composite inputs, Dolby decoders, networking capabilities, and more. Shipping is free and there's no sales tax (except KS, KY, ND, NY, WA). Compare this with $799 or more at Crutchfield and J&R.