Seriously you are all drunk if you dont think FF7 is the best of the series. Everything in that game is awesome and is loaded with content. None of the later games had the same ammount of content and variety.
Great storyline, flexible and customisable combat system, plenty of mini games and player choices (think of that gold saucer for example, or even that epic bitchslapping scene or how you could choose wich female to go in a date with, etc), varied overworld and towns with clear cultural inspirations, incredible characters, epic storyline and wonderful memorable music. It was a heck of a journey through the land and of self discovery and a lengthy quest.
None of the later games had ALL of these points. One can argue FF9 a bit, but none of the other FF's have excelled at at all of those points, none other got all of those.
Also guys, i sugest you better stop setting versus XIII up for fail. It will be no FF7 because squeenix is nothing like it used to be.
Wada is trying to force the employees to create something new they can milk, leaving FF7 as a final trump card. Much like the carrot on a stick. Dunno if thats gonna work though.