Square/Enix is currently taking another stab at trying to resurect some interest in the Super Nintendo generation of Final Fantasy (IV-VI). They made a half-hearted attempt a few years ago by releasing PS1 versions which featured the original version with some CGI openings and endings bookcasing the game. It didn't work very well, many fans didn't find the cutscenes very fantastic and the rereleases were a relative flop. Nintendo also made an attempt in bringing some life into IV and VI a few years ago by releasing FFIV for the Gameboy Advance (with a VI edition for the Advance I think currently in the works). They added some extra features such as a new dungeon and a feature which allowed you to pick an alternative party to fight the end boss; however, again fans were dissapointed with the lack of updated graphics and new implements to the overall gameplay.
However, there is light at the end of the tunnel. As I think I might of mentioned previously, or perhaps in an alternative thread, Square/Enix and Nintendo are working together and have recently made a greater effort in bringing some life into these older classics onto the Gameboy DS. The technological abilities of this newest Gameboy is much better than the Advance was, so now they are flexing some creative muscle experimenting with new 3-D battle scenes, CGI cutscenes, and adding new innovations to the original gameplay. FFIV DS is slated to be released in Japan at the end of this year... and (to finally answer your question Miss Lockheart, lol) I'm sure VI will be soon to follow. No news for a new VI has been officially released but I'm sure it can be assumed that it will happen sometime in the near future. And I would definately wait for this release to play. If you find a Super Nintendo version, you could play it and I'm sure you would get a lot out of it; however, the graphics are very dated, obviously. I think waiting for a rerelease for the DS would be the way to go. That will be the next time I'm gonna play it. But hey, do whatcha like. It's a free world.
Oh my god, I'm such a rambler, I just drank the largest Orange Julius I'd ever seen and I'm so full of sugar, I had to type the sugary junk out of my system, lol.