I took the plunge on V for the community playthrough and will probably get VI based on that experience (which has been purely positive with mods). The only thing of note is that the characters look weird when they're moving, but IMO everything else looks pretty great. Given that VI has even more mods due to it having rabid fans, I anticipate an even better experience with that.
I want IV (because I'm in the middle of that right now for the retrospective), but I'm gutted it's the DS version and not the 2D PSP remake, which IMO is a pretty perfect representation of what a SNES era remake should be. So I won't be buying it.