I DID PLAY LUFIA 2! And it's one of my favorite RPG's of all time! It also has a special place in my heart, since I played it at an early age, so...
As for the ending, I'll chose VII. As much as I agree that it was a damn cliffhanger, when I finished, I simply was like "wtf?" and "this can't be". I even thought there was a different ending if you collected all the huge materia. (I was 12 at that time, and had no internet, it was back at 2000, when I played it!) but yeah, I think it was a different ending than to what we were used to, and for that it gets my vote.