1) I believe that ethernet is subtly better than WiFi sonically, but it is VERY close. The real benefit of hard-wiring is that you don't have ANY dropouts due to network wifi interference, etc. I have a Super G router, not an 'N' type. The N type router may make this a moot point.
2) Thank you Srajan for sharing your experiences with everyone as there is SOMEWHAT of a technical hurdle with this technology, but once you get past that, it is simply such a pleasure to be able to access your music in this way.
Thanks,
Dan W.