Onkyo has a new model TX-RS-600 $499 is in your price range.
Three low price Onkyo authoriezed Etailer (so buyers are covered by manufacturer's warranty).
Best Price usually has the lowest price, call to find out, they typically don't usually negotiate price, good shipping (double box).
One Call has a sale, 10% off $499, free shipping, they usually match competitor's price, call to place your order if you would like to negotiate.
J and R is out of stock, they match competitor's price.
Best Price
http://www.bestpriceaudiovideo.com/products/product.asp?class=64
One Call
http://www.onecall.com/About.mpt?
ShowAnyway=1&ProductLineID=17&SubLineID=51
J and R
http://www.jandr.com/JRProductPage.process?Merchant_Id=1&Section_Id=946&Product_Id=2806300&showcase=t
