Jason, the installer is full of it, especially in regard to the absurd(at least $950 too high)cable suggestion, but also to a much lesser extent about the Lexicon. Go with one of the several excellent receivers with the most modern features, e.g. the Denon 3808 or the Onkyo 875(if the superior Reon video processor in the Onkyo is wanted), which are available for $1,000 or a bit more.

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Enjoy the music, not the equipment.