Yes I also experience lag when using media center on the XBOX 360. Usually when I want to stream music, i do it through the dashboard, on the media tab. All you have to do is configure your PC to share music with the 360.
This can be done by doing the following, just make sure the 360 is powered on, and connected to the same network as the pc with the media:
-Start, and then click network
- Then click Network and Sharing Center at the top
- Then go down to media sharing, expand it, and click change
- Then you can check the
Share My Media To box
- If everything is configured correctly, you should see an icon that says XBOX 360
- Click on the icon and click
Allow , and you need to confirm this with the UAC
Save all of the changes.
Then on the xbox:
Using your Xbox 360 controller, select the
media blade.
- Select music.
- Select Computer.
- On the Windows-based PC screen, select Yes, Continue.
After a few moments, your computer with the shared media name should appear.
- Under Select your computer, select your computer and the shared media name.
- Find the music that you want to play, and then select Play.
Hope this helps