I can say that I'm partial to the Sega CD version of Brave Warriors, the battle theme of Lunar 2. I was intrigued that the devs of the PSP version of Lunar 1 hired the same vocalist from the PS1 opening song and recorded a new English opening.
Plus, when I was doing my pre-med, I learned that Gallium is an element, which sounds close to the main villain's name.
I do recommend Grandia II. I never played more than an hour or two of Grandia III (and I've had the ending spoiled a bit), but Grandia II has stuck with me. I really enjoyed the plot for that one, and I felt my time with the game was worth it. It helps that Grandia II is about 30 hours or so. Plus, the battle theme of Grandia II is another excellent track.
Man, I miss that distinct Dreamcast era of games.
