David, A4L is highly reputable and I've dealt with them with great satisfaction. The factory refurbs have been inspected and should be at least as reliable as brand-new units.

To keep well under the budget, I'd suggest the 508 which Rick linked. In my view the 608 doesn't have enough more to justify the jump in cost. If there was a willingness to spend more, I'd suggest the RC180 for about $400, which has among other upgraded features the superior MultEQ(rather than 2EQ)version of Audyssey.

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Enjoy the music, not the equipment.