What is better the Sony dav hdx500i or Sony dav-hdx576wf theater systems?

The DAV-HDX576W Bravia Home Theater System is far superior than the other, as it has full 1080p sound quality, 1000w of power and much more to offer you in terms of value for money, such as an iPod cradle and Digital signal format auto detection / auto switching, multi-room audio output, magnetic shield, auto sound calibration, S-AIR technology.