I recieved my gw xbr and like it .I have on the floor ..Im waiting for a 18 riser to do the right thing. Cable looks like crap. DTV looks ok in pro mode with reality at 0 and clarity at 100% still get artifacts in basketball games are very hard to view with players look in view but back ground of people look out of focus can't find a happy middle. Do I need calibration by a tech at $375.00 to bring everything into focus. HDTV looks outstanding but. When do I spend the money on a tech ?