If we are putting albums into tiers, upon first thoughts, here's mine:
Tier 1 - Hypothetical
Tier 2 - Subsurface, March of Progress, Legends of the Shire
Tier 3 - Critical Mass, Dead Reckoning, For the Journey
Tier 4 - Clone, Psychedelicatessen
Tier 5 - Wounded Land, Extinct Instinct