Here's a question, should I play the original SNES games or is there a preferable hack that fixes any serious bugs? Any localization issues as well?
I'm also going to play the proto version of FFII for NES, & the translated FFIII on a PowerPak. I used to scoff at FF fans.
For FFIV, I recommend the PSX version. It has a VWF for the dialog, and is basically the same as the SNES version, with some new terminologies. The GBA version has a better translation, but the game mechanics are screwed up during the port (specifically lags during battle, and the graphics are off). The DS game has the best translation, but it takes the most liberty with the way the original game worked.
If you really want to wait? Wait until my FFIV hack is done.
FFV is best on GBA. No slowdowns, the graphics aren't that badly done, and the translation is awesome. There's a patch here that'll restore the soundtrack to sound more like the SNES version, too.
FFVI, same. GBA has the best version as far as I know. If you really want to experience what everyone else did in the 90s? Play the SNES version, it's still great.