Soop, since you're renovating, another point on the listening room is that in order to spread out the standing waves which exist in proportion to the various room dimensions it's desirable that no dimension be an exact multiple of another. So, if it's convenient, that 24' should be moved up or down a couple feet.

On the receiver, out of your two choices I'd take the 5803, but also consider the MCACC and other features of the Pioneer 49TXi.

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Enjoy the music, not the equipment.