I'm getting a Toshiba 50H81 this Friday and I'm a little curious about the proper way to use Avia on a 16:9 display. Should I use Avia in the 4:3 dispay mode (window-boxed) or stretched to 16:9? I'm guessing this might be an important distinction in the case of the sharpness settings, which use thin, vertical lines. I'd hate to use the stretch mode and get inaccurate results because the lines are now too far apart. Any suggestions?