So, what are the most "tricked out" versions of the games?

[johnboy3434]

I'm thinking of getting into the FF games, after beating around the bush and reading the gushing reviews for a while, and I wanted to get the best. I was thinking of sticking to the core games of the series (you know, for the sake of my sanity), and wanted to get the best versions of each one, because God knows they've remade the first few enough times. This is what I'm thinking of going for:

FF1&2: PSP versions
FF3&4: DS versions
FF5&6: GBA versions
FF7&8: PC versions

With FF9, 10, 10-2, & 12 each having one version Stateside. I'm not into the MMO scene, so I'm skipping FF11. Considering that none of them are related, storywise, I shouldn't be missing much, right? Are these the best versions of the games, or do you have alternate suggestions?

EDIT: Also, do you think there are upgrades for FF5&6 in the near future, either for the DS or PSP?