As a purist myself, definitely the SNES version. I was leaning toward a re-translation, not for authenticity sake, but solely for that like 'someone close to you' at the end of time, as it drove me nuts on my first play through looking for another quest that wasn't there.
Now that I think about it, as a purist I'd go for the retranslated version.
On second thought, I grew up with Frog's awesome accent, so, again, original version.