Oath in Felghana is by far the best Ys album ever released, imo. "Sealed Time" alone is worth the purchase of this album. If fuses rock, electronic, and some really badass violins seamlessly. If your saying Oath in Felghana has no electronic music and rock then I have NO idea what your listening to then. The whole album fuses electronic, rock, and orchestrated music all into one. Other noteable tunes are "Illburns Ruins", "The Boy's Got Wings", "Be Careful", "A Searing Struggle", "Steeling The Will To Fight", "Beat Of Destruction", "Valestein Castle", and well the whole album is great!
Oh, and this album also has one of the most powerful final boss themes ever created..."The Strongest Foe".
Origins was lack luster compared to Felghana. I'd say the best current Ys albums are Napishtim and Felghana....then Origins. And I'm not counting the SAVs, if I did Origin's SAV thrumps Felghana's by far.
Maybe you should check out Ys -The Oath in Felghana- Pre Arrange Version it's a lot more synthy since they were the working versions of the final songs....It came with the Limited Edition of Ys The Oath in Felghana PC game, the box set includes Ys Premium Music CD Box in Felghana which virtually has every reincarnation of Ys III music theres been. But anyways the Pre Arranged Version has a killer song at the end of the disc called "Decendant of Genos" which was never included into the game. Check it out.
I forgot to mention Bernhardt if you liked Napishtim's OST so much you should check out YS VI THE RETURN a doujin album by Atsushi Fukai. It's very wonderful. The tracklisting goes as follows
Ruins of Amnesia
Defend! And Escape!
The Ruined City of Kishgal
Mountain Zone (Ver. 2)
Ernst (Moon Over The Castle vs. Gran Turismo)