I have had nothing but issues trying to get this working. I have tried 3 different N routers, ending now with the Xtreme. I have the 552 internal xtreme wireless card for the desktop and I still get choppy hd playback wirelessly. This is my system.
Core 2 Duo e4500, 3 gig ram, 500 gig hdd, running vista. Got the dir-655 upstaris. And I got a Linksys N gaming adapter changing the xbox from ethernet to wireless, and the pc with the internal xtreme 552 5 feet away from the xbox. Playback is choppy as heck, no matter what I do. I even moved the router down stairs with the setup, and ran the xbox wired, with the computer still wireless, and nothing, its still choppy. I am using WPA2 (aes cipher), disabled qos and the smart traffic thing all together to limit issues, still choppy. Tried switching to all n mode, still choppy. What is the issue?