How many versions are there? This one says 1.78 aspect: http://www.bestbuy.com/site/olspage....8&type=product This one says 1.66 aspect and DTS: http://www.buy.com/retail/product.as...101&spf=1&sp=1 I'd like the best one. Which should I go for? Are they different at all, better quality? Any versions I am missing here?