Nacho1162,
Welcome to the forum, and thanks for considering a Samsung televison.
The main differences are that the A760 will include the Preloaded Content Library (included games, stories, screen-saver) as well as be DNLA Certified for playing movies from a computer via Ethernet. The WiseLink will allow you to play music and pictures from a thumbdrive, but the A760 models will also allow video.
I hope that helps explain the difference in the models. If you have any questions, please let me know.
--HDTech
(We don't do a A750 in plasma lines, just for references)
OK, so I've decided to purchase a new plasma TV and have narrowed it down to either the 63" series 6 or the newer 63" series 7. My question is, whats the major difference between the two? I looked up the specs on Samsungs web site and couldn't really find anything. Considering I can get a series 6 for hundreds less than the 7 any useful info would be greatly appreciated.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic