This thread showed up in a google search, lol:
I'm such a huge fan, so I can't make a proper limited list
Astronome
Radio
Aporias
Cartoon S/M
Chimeras
What Thy Wilt
Mount Analogue
Fragments, Prayers and Interjections
The Garden of Early Delights
On The Torment of Saints
Simulacrum
Naked City (debut)
The String Quartets
IAO
Templars In Sacred Blood
The Alchemist
Songs Without Words
Hen To Pan
Grand Guignol
At the Mountains of Madness
Spillane
Interzone
Angelus Novus
Elegy
Guts of a Virgin
The Gift
Hermetic Organ (2 or 3, they're all amazing though)
Classic Guide to Strategy
Cobra
Anything from the original Masada band and the Book of Angels (that's an entire world in itself!!)