Pink Floyd - Dogs, Echoes, Run Like Hell, The Great Gig In The Sky, Any Colour You Like... the list could go on and it needs no comment...
Porcupine Tree - Arriving Somewhere..., Anesthetize, Gravity Eyelids, The Incident... same as above, absolutely one of my all time favourite bands ever
A Perfect Circle - It's easier to write what i DON'T like and that's the "Emmotive" album... except Passive
Karnivool - love everything... modern aussie prog, crazy good
Nine Inch Nails - The Great Destroyer, The Wretched, Ghosts III and IV, Head Like a Hole, Echoplex... again - the list could go on and it's hard to comment
Explosions in the sky - Your Hand In Mine - it was "our" song with my ex, i still love it, it's emotionally very intense

and i bet i forgot something...