A Onkyo TX NR-809 is a more than capable receiver, that is pretty reliable and offers 135W over the first two channels driven. With that large of a space, you would want to get all the horse power you can get for the money. With your budget as stated, this would be one you could consider, the feature set is no slouch as well.

It can be purchased on line for a little less than a thousand. Accessories for less, will usually have some refurbished ones for about six hundred.

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