Leaving Eden and Saviour are great albums, on Lights Out and Planetary Confinement the song quality is hit-or-miss. Haven't heard the new album yet, but I'll get it for Christmas.
I have to disagree with those who think Antimatter sounds like Anathema - obviously Duncan was involved originally and even recycled some old Anathema melodies, but those albums, except Planetary Confinement with its semi-acoustic sound, are more electronic/ambient than anything Anathema has done. Maybe Leaving Eden has some similarities because of the guitar-based atmospheric rock sound and Danny's lead playing is recognizable, but it still has notable differences to Anathema.