Anyone seen this TV in action? How were the black levels? I'm trying to find reviews on this set but having a hard time finding in depth reviews. I'm guessing the black levels are decent but not on the same level as Samsung or Panasonic, I could be wrong. I'm trying to find 50" 1080p plasmas in the $800-900 range. I just don't want to buy a TV with grayish/blue blacks.