Hello! I've frequented this forum quite a bit but never registered/posted as I am mostly a car audio nut until about now, as I am putting an HT in at my home. I am looking for an Onkyo TX-DS575, TX-DS575x, TX-DS595, or their newest SR600, but I would prefer the 575 styles as they would be a little less expensive and would suit my needs perfectly. Also, does anyone know the difference between the 575 and 575x? Thanks and let me know what you have!