Ichigo, in the U.S. the factory refurbished Onkyo 707 is available for around $400, a outstanding buy, and I've suggested it several times recently. In your situation, however, if the prices of those listed are nearly identical, the pick should be the Denon 3310. If video processing might be significant to you, the 3310 has the superior Anchor Bay processor. Stop looking.

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Enjoy the music, not the equipment.