Yeah, Lunar 1 and 2 are awesome. I think the Sega CD ones were the best from what I have seen/played. I must admit though that the only one I ever beat, because I mainly only watched my friend play it, was the japense Saturn import of part 1. I didn't like the addition of seeing your enemy before you fight them, I have never enjoyed that as much as straight randomly generated battles. It was still a great game though.
Also, playing all of the way through a RPG is japanese is pretty cool, it is not as hard as one would think it just takes a little more time.