I watch a lot of 4:3 programming, but I want to buy a 16:9 HDTV before the Red Sox home opener in April. (Sox fans are masochists.) I just can't figure out the math: What size 16:9 set should I be looking at in order for 4:3 programming to be at least 36" corner-to-corner, without stretching, zooming, etc.?? (Yes, a 36" image not including the gray sidebars.) Thanks!