Shag, since he's alone he's got the sweet spot all to himself and a center speaker isn't essential. M22 mains forming a "phantom" center for someone right in the middle, two M2s for side surrounds(QSs don't appear possible within the budget), and an Outlaw LFM-2 sub total about $1,000 or maybe a bit less if the 10% and 5% discounts can be used.

Good choice on the 604, but it's available for around $380 from J&R and 6th Ave.

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Enjoy the music, not the equipment.