You don’t have to be a Denver Bronco or Seattle Seahawk fan to appreciate a good deal on a new TV. The week before the Super Bowl is the best time of year to buy a big-screen TV, even better than Black Friday, according to industry analysts.The Super Bowl is not only an exciting time for pro football fans, the game creates its own economic boost with people flocking to grocery stores to buy party supplies, or making the plunge for a new showpiece TV.“We definitely get a good lift,” said Foodland Plus owner Dennis Lann. “All the party snack stuff, the party meat and cheese trays, and chicken tenders are all good sellers. The Saturday before the Super Bowl is always a good day in the grocery business.