I own a Panasonic 1080i telly and would like to know if I'd see a noticeable difference in quality if I ventured into the blu-ray market. I have a large collection of standard DVDs, but would obviously start a blu-ray collection if I made the purchase. I'm thinking of a Panny model as they seem to do well in the tests and combine nicely with my TV. Would it be worth the investment? I've had conflicting advice from different salespeople, so some objective advice would be greatly appreciated. Many thanks!