I got the steam port, it's not bad, and looking at its file structure, looks like it'd be quite easy to mod... All we need is a way to extract and recompile its archive format and we can fix those low res textures. Its music is in looping ogg format, so that can be swapped out easily (not that there's anything wrong with it now).
EDIT:
For anyone who want's more info on whether the port is worth buying... It's definitely higher res than the DS version, it looks sharp. The opening FMV has some nasty upscaling artifacts, but it's just an mkv file so it'll be easy to replace. The font seems to have some weird glitch where it displays erroneous pixels here and there around the text, not sure what that's about. The textures on the low poly models look decidedly old-school with massive pixels, far worse than say FF8 on PC. They could really do with some modding. One nice touch is, it has the same launcher window as FF7 and 8 on steam. Points for consistency lol.