Jason, I had a similar experience with Ecost. My HK AVR125 was an absolute lemon-Ecost refused to provide anything except Harmon Kardon's phone number. It turns out that Ecost was not an authorized HK dealer, I did discover that PCMall is the parent company of Ecost and was an HK dealer. Harmon Kardon was great and decided to honor the warranty. After 3 visits to an authorized repair shop the receiver was deemed a lemon by Harmon Kardon and they sent me a new AVR130. Keep hammering on Denon-and if you paid with a credit card dispute the charges. My experience with Ecost was awful-price was great, but their service people were awful. (One lady in fact told me that it looked like I'd bought an expensive paperweight and that I should have read the fine print). Good luck

M22's, VP150, QS4's, HK 630, HSU VTF3-MKII