At the time, I played FF I-VI for the GB advanced but did not 100% complete the games. I'm now going to replay the first six for this purpose as I've already done this for VII-X(2)* and now that new formats have been released and even some recommending old ones, which formats for FF I-VI are the best in terms of being the best enhanced and still true to the original?

*The PS4 HD Remaster for FF X/X2 is best.