I am a fan of every symphony x song to date, and this album changes nothing. In fact, I found I LOVED a greater percentage of these songs than on almost any previous album. It is impossible for me to pick a best, as they are all about equal to me, but the worst two if i HAD to pick them, would be light up the night (worst) and heretic (second worst).
light up the night is the bands first attempt at pure power metal, a genre i hate to begin with. however, the neoclassical interlude is awesome. the verse riffs and vocal melodies are not great, but the chorus is ok. the second half of the song is amazing. while i rip on this song, it is nowhere near bad enough for me to skip or to actually complain about. ok ok i must say "my dying eyes scream with pain" is not great. least fav lyric actually.
heretic the only thing i do not like is the verse vocal melodies and the "watch me burn, live and learn" lyric.
as for most vocal melodies and lyrics, i love them, and a clever listener will pick up references and even a story in there. for everyone complaining about the lyrics, all the bands you listed have worse lyrics than SX by far. give me music better than SX and then maybe i will let you complain. peter gabriel? turisas? come on...
and for those who think the riffs are recycled...you clearly do not know what a reference is. There are tons of very clever riff-references in this album, almost none of which seem like recycled riffs to me. You think they sat with this for 4 years and did not consider the fact that they were recycling? Don't be naive.
this is AT LEAST their second best album. the odyssey may take it by a nudge, but I would not say that with any confidence.