Any album from Divine Wings onward is amazing. Twilight In Olympus is actually a really awesome album will some killer tracks on it (Smoke and Mirrors, Church of the Machine and Through the Looking Glass), it just sounds a little incomplete cause they had to cut the epic title track from the album, which they then expanded into V, so I guess it worked out for the best after all.
As for Paradise Lost, I love the album personally, though Twilight and V are my favorites, I consider PL at least comparable in quality to Divine Wings and Odyssey. Paradise Lost is basically Symphony X's answer to Priest's Painkiller or DT's Train of Thought; it's a straight forward, all out metal album. For what it is, it's amazing, and there are some really stand out cuts on that one too (the title track, Walls of Babylon and Revelations, in particular). If you want a Symphony X album where almost every song is a "Of Sins and Shadows" or "Smoke And Mirrors", balls-to-the-wall, high speed symphonic shred-fest, then you can't do any better then Paradise Lost, but if you want a more balanced album that presents all aspects of the band more evenly, the albums from Divine Wings to Odyssey are a better choice.